Thanks Bill
The mechanism mounts onto a 41mm hub, which is bolted to the motor endcap. The drive 'pulley' is a .625 diameter rod with 5/16 hole drilled/reamed. I did this in an ER32 collet chuck on the lathe to retain concentricity. 2 8-32 set screws (I need to get one really short one) hold the pulley onto shaft.
I am working through a list of tooling to make to ease working on whatever the next project is. Having metal on-hand means I can get started without any spend$paralyis holding me back :-)
Gerrit