Back to brakes. I used a chrome rear rim from a coaster brake bike, didn't think thru the angled side walls of the rim, and how that would effect using V brakes. I needed to get the brake pad to sit at an angle to the brake to hit the rim square, and because I mounted the brakes on the chain stays, I need to keep everything in tight to avoid the crank and chain. created my own problems, huh. Threaded the brake pad all the way down, and cut a join nut on an angle to allow the brake pad to sit at the angle I need to hit the rim square. I'll have to cut another washer type shim on the same angle to match the back side if the normal circle nuts from brake pads don't tighten up.