Got this in PM but figured it might be helpful to post on here:
"I'm presuming that it's a panaracer / xenon spur on your TC6.2?? Have you done anything about the fact that the centre boss of the spur is thinner than the AE spur??
If you just screw everything together, there's a gap of around 0.8mm (from memory!) between the spur boss and the belt pulley which I figured in some way could be an issue. Have you done anything about this or just let it be like that?"
I am using the Panaracer gear, haven't run it yet but I have heard great things. The center boss is thinner than the kit gear by about .7mm, I tried mounting it as is but things just didn't line up well. I placed 3 .5mm shims between the spur gear and aluminum plate that the screws pass through, that seemed to take care of everything. Just very important to make sure all 3 screws are tightened evenly since that aluminum plate is no longer in contact with the spur itself.