Jerry, why not just pop the belt on and off when you need (and don't need) the low speed motor?Grigg
I'm somewhat lazy at times- - - -I prefer to flip a switch to get low speed, rather than fumble with a belt. I'm well into designing and building the one-way clutch, which even includes a Torrington-type flat needle bearing between the parts of the low-speed pulley hub in addition to the Sprag clutch.
Jerry