Not all e28 wheels are created equally. You are probably aware that BMW switched to fine spline in 85, but there are multiple course spline hubs also. You can see this with the “2005” momo hub and the C157. The splined boss that protrudes is different.I was trying to fit my favorite steering wheel on my E3 and thought it would be more straightforward. It is a stock coarse spline E28 wheel. is there a spacer that I need to remove?