I have a belt-drive rear cog that is meant to be used with some sort of IGH. It has three tabs/splines. I don't want to run it with an IGH.

I need it to fit over a hub meant for a standard cassette. I actually have 2 of them, and I've "forced" one of them over the cassette body of an old wheel, but I want to adapt it to work before I put it on a "real" wheelset that I'm going to use for belt-drive and singlespeed. I just don't want the cog to cut into the splines of the cassette body.

Suggestions? Machinist? DIY, and don't worry about the cassette hub body? I am just trying to get several ideas and/or perspectives.

Thank you.