Hey, this Mini I bought just arrived. It came with a ball diff that had been assembled by the previous owner (the car has never been run). The diff itself feels "notchier" than I'd prefer. What sort of build tips should have been followed? Sanding rings, etc?

What should I be feeling for when adjusting. The car/parts came with the packaging card for the ball diff with the rudimentary assembly instructions but nothing that really indicates how to execute adjustment/what am I feeling for?

Thanks,

Scottrik