Bow press 40*40 box 50*50 box heavy wall 4? maybe it fits tighter with the 40 inside 40*40 angle iron 16mm Threaded rod + nuts as course a thread as you can get budget permitting Cutting list (frame) 2 -50*50 @ 200mm 1-50*50 @ 800mm 2- 40*40 @ 200m 1- 40*40 @ 750mm 2- 40*40 angle iron 150mm Fingers to hold bow 4 - 200*40*10 plate (If it exists I cut 40mm stips off a piece off 200*10 plate with a drop saw as we had the plate around. It took 2 hours the way old blokes work . I drilled 3 holes in the plate and bolted them together as I ground them to final shape one hole was the top corner . Handyman @ Home method with file , angle grinder,drill