I've had some questions about the pulley that I made for the spindle on the SX3 spline. I thought I would show a photo of it since I have the camera today.
This was the first revision of the pulley and I still have to get more stock to tweak it with. I started with 1.75" steel 1018. It could be done with AL also. I also modified the plate that it attaches to in order to add the 2 bearings that Old MegaWatts mentioned in his post. Rather than to bore out the plate on the back, I simply faced it on the top and then added retainers on the bottom to keep the Bearings pushed up. that kept my bore aligned and still served the same purpose. Plus if I go back to a single bearing, the only downfall is the gap difference at the top of the plate.
But, I have some other ideas on how to connect to the spindle without using the splines.
That will be revision 2.