[Doug G]

We drilled a 1/2" diameter hole into one of the AM side plates, 1.125" away from the output shaft, center-center. Then squeezed in a 36 tooth, 32 pitch, nylon gear, bored out to 1/2" and keyed, on the output shaft where the sprockets are (we acually only used one sprocket). Then another of the same gear on the encoder and you're rolling!!! If you can't broach a keyway, just file one in the nylon gear. Nylon gears are at McMaster... part no... 57655K43 . They come with a 1/4" bore which fits the encoders, but you must bore this out for the output shaft. Here's some pics of our from last year...