by War Eagle River » Sun Aug 04, 2019 4:29 pm
One thing to consider concerning the disc. Use as small a disc as possible. And shine the laser dot as close to the middle as you can. The closer to the shaft the beam, the more accurate the reading. I used a small aluminum disc, 3/4” diameter. Epoxied an axle stop with a set screw in it. Pained it flat black, put on a strip of reflective tape.