The "Ultimate Evil" One Bar Prison Construction and Usage October, 2022 This manual describes the construction and usage of the "Ultimate Evil" One Bar Prison device. Revision/Update Information: V1.1 / This is a revised manual. Major changes from the V1.0 manual are shown with a vertical bar in the margin. https://www.evilobp.fun https://www.reddit.com/r/OneBarPrison October 26, 2022 This document and included images are licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) license. Contact the author via the one of the methods listed in Appendix D if you would like to discuss alternate licensing and usage rights. The information in this document is prepared for entertainment purposes only and should not be construed as any representation by the author as to the safety or reliability of the described device. The author specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. DANGER: Improper usage can result serious injury or death. Never use without another trained person present at all times . Use common sense. TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners and are used solely for identification purposes. Contents PREFACE viii CHAPTER 1 INTRODUCTION 1–1 CHAPTER 2 NECESSARY AND OPTIONAL PARTS 2–1 CHAPTER 3 REQUIRED TOOLS 3–1 CHAPTER 4 PLYWOOD CUT DIAGRAM 4–1 CHAPTER 5 ASSEMBLING THE BASES 5–1 5.1 ASSEMBLING THE BASE FOR THE SLIDING PLATFORMS 5–1 5.2 ASSEMBLING THE OPTIONAL NON-SLIDING BASE 5–3 CHAPTER 6 ASSEMBLING THE SLIDING PLATFORMS 6–1 CHAPTER 7 BUILDING THE POLE REINFORCEMENT PLATE 7–1 CHAPTER 8 DRILLING THE BASE(S) FOR THE REINFORCEMENT PLATE 8–1 iii Contents CHAPTER 9 PREPARING THE WOOD CUBES 9–1 CHAPTER 10 STAINING AND FINISHING THE WOOD (OPTIONAL) 10–1 CHAPTER 11 MODIFYING AND ASSEMBLING THE 3XLR CONNECTOR AND POLE ADAPTER 11–1 11.1 PREPARING THE POLE ADAPTER 11–1 11.2 MODIFYING THE 3XLR CONNECTOR 11–2 11.3 BONDING THE 3XLR CONNECTOR TO THE POLE ADAPTER 11–4 CHAPTER 12 MODIFYING AND ASSEMBLING THE POLE 12–1 12.1 PREPARING THE POLE TUBES 12–1 12.2 CUTTING THE POLE TUBES TO THE CORRECT LENGTHS 12–3 12.3 DRILLING THE POLE TUBES AND ADAPTER 12–6 12.3.1 Constructing the wood template 12–6 12.3.2 Using the template to drill the upper tube and adapter 12–9 12.4 REATTACHING THE THREADED BASE PLUG TO THE POLE 12–14 CHAPTER 13 BONDING THE POLE TO THE CONNECTOR PLATE (OPTIONAL) 13–1 CHAPTER 14 REASSEMBLING THE VARIOUS COMPONENTS 14–1 iv Contents CHAPTER 15 INSTALLING THE SPRING (OPTIONAL) 15–1 CHAPTER 16 TESTING 16–1 16.1 TESTING THE SLIDING PLATFORMS 16–1 16.2 TESTING THE REINFORCEMENT PLATE 16–3 16.3 TESTING THE TELESCOPING POLE 16–3 16.4 TESTING THE 3XLR ATTACHMENT AND DILDO 16–4 CHAPTER 17 USER TRAINING AND OBP USAGE 17–1 17.1 PRACTICING ON THE NON-SLIDING BASE 17–3 17.2 BECOMING FAMILIAR WITH THE SLIDING PLATFORMS 17–4 17.3 PUTTING IT ALL TOGETHER 17–5 17.4 PRACTICE TIME IS OVER 17–6 CHAPTER 18 ADVANCED TOPICS 18–1 APPENDIX A SUMMARY OF CHANGES A–1 APPENDIX B BORING TECHNICAL STUFF ABOUT MATERIAL STRENGTH, ETC. B–1 v Contents APPENDIX C ACKNOWLEDGEMENTS AND SHOUT-OUTS C–1 APPENDIX D Q&A WITH THE DESIGNER D–1 FIGURES 1–1 Completed "Ultimate Evil" One Bar Prison 1–1 1–2 Some of the commercially available dildos for the device 1–2 4–1 Plywood cut diagram 4–1 5–1 Decorative trim installation 5–2 5–2 Plinth attachment 5–3 5–3 Completed non-sliding base 5–4 6–1 Hole locations in platform 6–1 6–2 Drawing a bolt head into the wood 6–2 6–3 Two trolleys attached to the platform 6–3 6–4 Testing the fit on the floor 6–4 6–5 Platform on base - front view 6–6 6–6 Platform on base - top view 6–7 6–7 Completed platforms on base 6–7 7–1 Reinforcement plate with wood glue and clamps 7–2 7–2 Marked lines and portable drill press on reinforcement plate 7–3 7–3 Routed reinforcement plate and connector plate 7–4 7–4 Reinforcement plate showing connector plate depth 7–5 7–5 Reinforcement plate showing drill marks and tape 7–6 7–6 Reinforcement plate bottom and top view with hardware 7–7 7–7 Completed reinforcement plate with pole 7–8 8–1 Marking the center of the non-sliding base 8–1 8–2 Non-sliding base with holes drilled, showing reinforcement plate 8–3 9–1 Cubes marked and drilled with pilot holes 9–1 10–1 Sliding platform after staining 10–2 10–2 Sliding platform after staining and finishing 10–2 10–3 Base with warning label 10–3 11–1 Plug and pole adapter 11–1 11–2 Removing the boot from the 3XLR connector 11–2 11–3 3XLR top part separated from connector body 11–2 11–4 Before and after connector release button modification 11–3 11–5 3XLR connector showing release button modification 11–4 11–6 3XLR connector with tape on pole adapter 11–5 11–7 3XLR connector with tape, before and after notches 11–6 11–8 Tape on pole adapter 11–7 11–9 Epoxy on pole adapter and 3XLR connector 11–8 11–10 Epoxy on assembly of pole adapter and 3XLR connector 11–9 11–11 Completed epoxy procedure 11–9 vi Contents 12–1 Measuring and cutting the end of the lower tube 12–2 12–2 Upper tube insert 12–2 12–3 White plastic sleeve marked 12–3 12–4 White plastic sleeve cut 12–3 12–5 Wood template showing center points and lines 12–6 12–6 Drilling the 38mm hole 12–7 12–7 Marking 38mm hole edge for drilling 12–7 12–8 Preparing the plywood and drilling the 2 x 6 12–8 12–9 Finishing the 3/16" hole in the template 12–9 12–10 Marking the tube and adapter for drilling 12–10 12–11 Bolt through tube with adapter and view through tube 12–11 12–12 Drilling second set of holes in tube 12–12 12–13 Two heights for the 3XLR pole adapter 12–13 12–14 Three methods of attaching the 3XLR pole adapter 12–14 12–15 Cutting the aluminum tube off the base plug 12–15 12–16 Aluminum tube split off the base plug 12–15 12–17 Cleaned and prepared threaded base plug 12–16 12–18 Preparing the lower tube with epoxy 12–17 12–19 Threaded base plug fully inserted into lower pole 12–18 12–20 Borescope view of the completed assembly 12–19 14–1 Detail showing centering of middle cube 14–1 14–2 Finished sliding platform with hardware 14–2 14–3 Detail view of trolley assembly 14–2 14–4 "V" notch in end cap 14–3 14–5 Aligning cubes with edges of base 14–4 14–6 Fully tightened channel section bolt, washer and nut 14–4 14–7 Front, top and rear views of installed end cap 14–5 14–8 Wing nuts and washers on underside of base 14–6 14–9 Non-skid mats on sliding platforms 14–7 14–10 Non-skid mats in factory packaging and cut / rolled 14–7 15–1 Preparation of dowel and attachment of spring 15–2 15–2 Dowel with both springs attached 15–2 15–3 Spring assembly installation in pole 15–3 15–4 Force gauge showing pole effort without spring 15–4 16–1 Clearance between various components with clevis pins installed 16–2 16–2 Pole control ring 16–4 16–3 Release pin location on 3XLR connector 16–5 17–1 The view when about to get onto the "Ultimate Evil" OBP 17–2 17–2 Latex tubing on clevis pins for noise dampening 17–6 vii Preface This manual explains the construction and usage of the "Ultimate Evil" One Bar Prison. Refer to Chapter 1 for information about One Bar Prisons in general and what makes this design the "Ultimate Evil" version. Intended Audience This manual is intended for fellow kinksters. It describes the construction and usage of the "Ultimate Evil" One Bar Prison. Important Warning DANGER: Do NOT do stuff that can get you or anyone else injured or killed. Always good advice, regardless of whether you’re driving to work, skydiving, or using a One Bar Prison. Useful Web Sites The following web sites should be useful to One Bar Prison fans: • https://www.evilobp.fun - the one and only web site dedicated to the "Ultimate Evil" One Bar Prison • https://www.reddit.com/r/OneBarPrison - main One Bar Prison discussion forum • https://www.reddit.com/r/BdsmDIY - general discussion of DIY BSDM projects • https://discord.gg/MmpT9xE - KinkyMakers Discord, particularly the #bondage-gear channel The following are web sites for some suppliers mentioned in the parts list, in alphabetical order: • https://www.adorama.com - connector plate (pole base) • https://www.amazon.com - 3XLR connectors, non-skid mats • https://www.compressionspring.com - spring for optional lift assist • https://www.homedepot.com - general construction materials • https://www.kellyhayes.com - Unistrut components • https://www.latex-tubing.com - latex tubing (noise reduction) • https://www.lowes.com - general construction materials • https://www.sweetwater.com - telescoping pole Notes: This list is unfortunately US-centric. I welcome information about alternate suppliers, particularly international ones, and this manual will be updated with that info in the future. viii Preface While it should be obvious, none of the above companies have any knowledge of this project and certainly do not endorse it in any manner at all. Conventions In this document, the following conventions will be used: • Captive - the person who is being restrained by the One Bar Prison. Some materials refer to this as the "victim" or by other terms. I prefer the term "captive" as "victim" implies at least some unwillingness or lack of consent. • Captor - one or more people who are responsible for the operation of the One Bar Prison as well as ensuring the safety of the captive at all times • One Bar Prison (OBP) - the actual device, including any accessories. • Device - in this document, refers specifically to the "Ultimate Evil" One Bar Prison. • Note calls your attention to particular points of construction or usage where more than the normal level of attention to instructions is required. • Caution indicates that if a procedure is not followed, damage to the OBP or its components may occur. • WARNING indicates that particular care needs to be taken to prevent possible personal injury. • DANGER indicates that particular care needs to be taken to prevent serious personal injury or death. ix 1 Introduction Figure 1–1 Completed "Ultimate Evil" One Bar Prison This chapter provides an overview of the "Ultimate Evil" One Bar Prison. Note: It is important to read this entire manual from beginning to end, possibly several times, before ordering any parts or beginning the construction process. You probably already know what a One Bar Prison is, but in brief it is a platform with an adjustable pole with some type of dildo mounted to the top. The pole and dildo are raised and inserted into the vagina and/or anus of the captive. When the captive is wearing high heels or is otherwise unable to lift their body off the dildo, they are utterly unable to escape without the aid of another person. Almost all of these designs have been the same thing - a simple stand with a telescoping pole that the captor can manually adjust to control the amount of the dildo that is penetrating the captive’s orifice(s). 1–1 Introduction I felt I could bring a number of innovations to the basic OBP design. I wanted my OBP design to be something that others could replicate without needing to have expensive or unusual tools available to them and where as many of the parts as possible were readily obtainable, either from nearby "big box" lumber / hardware stores or online suppliers. In some cases, this has led to somewhat expensive parts being used. A benefit of this is that my design is vastly overbuilt in terms of necessary strength. The main design advancements that I have made over the normal OBP are: • A telescoping pole that can be raised by the captive or captor with only a few fingers, but which absolutely cannot be lowered without the captor turning the control ring to the "Lower" position. This ring is out of reach of the captive. • Adjustable footrests which can be fixed in position or allowed to slide along a track, letting the captive do a "split" of varying amounts. If the captive moves their feet further apart their body will lower itself onto the dildo. Also, it is much harder for the captive to remain motionless when they have to constantly keep their legs a specific distance apart. • An optional spring inside the telescoping pole which will cause the pole to lift up at the slightest provocation. If the captive attempts to climb off the pole, the simple movement of the dildo on the pole will cause the pole to extend by itself until further resistance is met. This eliminates the need for the captive to wear high heels, as there is no way to lift off the pole anyway. • Quick-disconnect interchangeable dildos using the common 3XLR connector found on many "fucking machine" devices. This allows the captive to select an appropriate dildo based on length, girth, and firmness. It also improves hygiene as different captives can select an unused (or previously cleaned) dildo of the desired size and rigidity for their time on the One Bar Prison. Here are a few of the commercially available dildos that fit the device: Figure 1–2 Some of the commercially available dildos for the device 1–2 Introduction The hardware design is licensed under the Creative Commons Attribution- NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) license. Contact the author via the one of the methods listed in Appendix D if you would like to discuss alternate licensing and usage rights. 1–3 2 Necessary and optional parts To build your own "Ultimate Evil" One Bar Prison, you will need: • This manual • 3/4" x 4’ x 8’ sanded birch plywood [Home Depot 454559 / Lowe’s 2592978] qty. 1 (cut to order per Figure 4–1) • House of Fara P356P 7/8" x 3-1/2" x 6" pine plinth block [Home Depot 349941] qty. 4 (+ 4 more if also making the non-sliding base variant) • Weaber WW998 5/8" x 3/4" x 8’ trim moulding [Home Depot 552091] (for optional decorative trim) qty. 5 (+ 2 more if also making the non-sliding base variant) • 4" x 4" x 4" wood cubes [Amazon B08GP41Z8R] qty. 6 • Hillman 532604 18 x 1-1/4" wire brads box [Lowe’s 128126] (for optional decorative trim) qty. 1 • Hillman 42602 #8 x 1-1/4" deck screws box [Lowe’s 755738] qty. 1 • Unistrut P1000H3-10-PG ordered as 2 x 5-foot lengths [Kelly & Hayes] qty. 1 • Unistrut P2860-10VYB black plastic end cap [Kelly & Hayes] qty. 4 • Unistrut P2750-EG channel trolley [Expensive! Look on eBay, etc.] qty. 8 • Hillman 881081 1/2" x 2" clevis pin [Lowe’s 138657] Qty. 12 • Hillman 881099 .125" x 1-15/16" hitch pin clips [2-pack Lowe’s 138717] qty. 6 • Hillman 61926 1/4" x 1-1/4" zinc finish carriage bolt [Lowe’s 240015] qty. 8 • Hillman 880124 1/4" hardened lock washer [5-pack Lowe’s 135474] qty. 2 • Hillman 880137 1/4" hex nut [5-pack Lowe’s 135476] qty. 2 • Hillman 240030 1/4" x 2-1/2" zinc finish carriage bolt [Lowe’s 63334] qty. 8 • Hillman 290012 1/4" x 1" zinc finish fender washer [Lowe’s 68882] qty. 16 • Hillman 880155 1/4-20 zinc finish wing nut [4-pack Lowe’s 135587] qty. 2 • Hillman 240188 3/8" x 5-1/2" zinc finish carriage bolt [Lowe’s 55815] qty. 6 • Hillman 290036 3/8" x 1-1/2" zinc finish fender washer [Lowe’s 68884] qty. 6 2–1 Necessary and optional parts • Hillman 180153 3/8" zinc finish nylon lock nut [Lowe’s 63405] qty. 6 • Hillman 491393 10-24 x 2" zinc finish screw and nut [5-pack Lowe’s 57863] qty. 1 • Hillman 490669 10-24 zinc finish wing nut [3-pack Lowe’s 58093] qty. 1 (for optional security) • Hillman 490652 10-24 nickel steel acorn nut [4-pack Lowe’s 58113] qty. 1 (for optional security) • Hillman 490694 #10 split lock washer [48-pack Lowe’s 58135] qty. 1 (for optional security) • K&M 24116 M20 connector plate [Adorama KM24116] qty. 1 • Ultimate Support SP-90B speaker pole [Sweetwater Sound SP90B] qty. 1 • JB KwikWeld 8276 epoxy [2-pack Lowe’s 355110] qty. 1 • Loctite Threadlocker 222 (purple) [Amazon B0002KKTT0] qty. 1 (for optional security) • Wood stain [I used Minwax Jacobean 2750] (for optional decorative finish) • Floor finish [I used Minwax Ultimate Gloss 13101] (for optional decorative finish) • 3XLR "Switchcraft A3F" [Amazon B071X443RN] qty. 2 • 3XLR dildos (as desired) • Exercise step platforms, 6" to 8" tall, 1 pair (for practice on non-sliding base) • 1-1/4" x 48" poplar dowel [Lowe’s 19414] qty. 1 (for optional spring assist) • 20.5" x 1.1" x 0.340lbs/in compression spring [Compression Spring PC055-1102-35700-MW-20594-C-N-IN] qty. 2 (for optional spring assist) • "Classic Grip Shelf Liner" mat [Amazon B01LW9HK2L or other color] (for optional non-skid platform mats) qty. 1 • 5/8" ID x 1/8" thick latex tubing [Latex-Tubing #2008] qty. 2 feet (for optional noise reduction) Note: Brands and model / part numbers are those that I used. With the exception of the Unistrut components, the Ultimate Support pole, the K&M connector plate and the Switchcraft 3XLR connector, you should feel free to substitute locally available parts. 2–2 3 Required tools You will need the following tools and supplies for construction: • Sawhorses • 5-gallon bucket or similar • Miter box and saw (for optional decorative trim) • Dremel tool (or equivalent) and cut-off bits • Plunge router and bits • Table saw (if not having wood store-cut) • Yellow wood glue • Small wood clamps qty. 4 • Plumbing tubing cutter capable of handling at least 1-3/4" diameter (for pole) • Drill (a drill press is strongly recommended) • 3/16" extra-long (6") drill bit • 17/64" drill bit • 25/64" drill bit • 7/16" extra-long (8") drill bit • 1-1/2" (38mm) hole saw with pilot bit (commonly sold in a set w/ 44mm and others) • 1-3/4" (44mm) hole saw with pilot bit (commonly sold in a set w/ 38mm and others) • 7/16" open end wrench • 9/16" open end wrench • Slip joint pliers • Combination square • Trigger pull force gauge (for calibrating optional spring assist) • Tack hammer (for optional decorative trim) • Tape measure • Protective eyewear • Pencil • Permanent marker, such as a "Sharpie" • 120 grit sandpaper • Blue painter’s tape 3–1 Required tools • Scissors or diagonal cutters • Small flat head screwdriver • Large flat head screwdriver • Plumber’s torch (optional) • Wire brush (optional) • Heavy-duty (5 lb.) rubber mallet • Borescope (optional) • Sharp razor blade • Acetone • Disposable plastic dinner knives • Scrap piece of 2 x 6 lumber approximately 1’ long • Pads, brushes and rags (optional, for applying the wood stain and finish) 3–2 4 Plywood cut diagram All of the plywood pieces needed are cut from a single sheet of 4’ x 8’ plywood. Refer to the cut diagram below for the exact measurements. The wood is 3/4" (18mm) birch plywood with a smooth sanded finish. This type of plywood also has additional layers for strength. Notes: It is assumed that you will have the home center or lumberyard cut the wood for you. Make sure that their saw is sharp and their measurements accurate, or you may end up with expensive but useless pieces of wood. You can cut the plywood yourself if you have a table saw, but a 4’ x 8’ sheet of plywood is often difficult to transport from the home center to your location. Most sanded plywood has a good side and a "not so good" side. The not so good side may have knot holes that were filled with wood filler and the surface may not be sanded as smoothly as the good side. Whenever you work with one of the cut pieces of plywood, ensure that the good side ends up on the top surface of each completed piece. Figure 4–1 Plywood cut diagram You will also need 2 square pieces of 3/4" plywood, 10" x 10" for the pole reinforcement plate. These are cut from the extra 30" x 24" piece labeled "Wood for Later Cuts" later on in Chapter 7. 4–1 Plywood cut diagram Notes: The wood cutting saws at home centers usually have trouble cutting to a major dimension shorter than around 2’ so you will likely have to cut the reinforcement plate pieces yourself. The unlabeled 6" x 12" piece will be used in Section 12.3.1 - do not discard it. 4–2 5 Assembling the bases This chapter also introduces the non-sliding base as an option. It will be needed to perform additional assembly, testing and usage steps as described later on in this manual. You probably already have most of the pieces, so you may as well go ahead and build it. Several later parts of this manual assume that you have it available. Note: Many of these procedures are performed with the project part(s) on sawhorses. These will not be individually noted as it should be apparent when the sawhorses are needed. 5.1 Assembling the base for the sliding platforms Base assembly is relatively simple. If you are installing the optional decorative trim, use the miter box and saw to cut pieces of the WW998 trim to the appropriate lengths with 45-degree angle cuts and attach them to the base with the wire brads. Notes: Using a miter box is an acquired skill. Cut the pieces a bit longer than required and then perform additional cuts to get them to the exact lengths needed. You may find that pre-drilling holes in the trim for the wire brads will reduce the tendency of the trim to splinter when the brads are being nailed. 5–1 Assembling the bases Figure 5–1 Decorative trim installation Attach each of the 4 plinths to the base using six #8 x 1-1/4" deck screws in each plinth. The unfinished ends of each plinth are oriented toward the center of the base. The decorative surface of the plinth is oriented to the floor (away from the base). If you have installed the optional decorative trim, align each plinth with the edges of the base and not the trim. The following picture should clarify this. 5–2