Chinese Brake for $20

 

Make a $15 "Back-Bend" Brake

Actual Bend Height (90 Deg.) = Height above bars + thickness
InSide Radius = 1 thickness

Making Prototypes:

Start with (folded and taped) paper prototype for the flat pattern.

Trace the flat pattern on (double) cardboard, 1/8" cut (half though with box cutters) on top of all the DOWN fold lines.

Use bending brake for alum. and steel prototypes.

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