My little contribution.
This is a Affix/KHE style coaster I machined down.
I turned down the non drive side flange and re-drilled the holes.
I femaled the axle and extended the thread in the non drive side so the thicker cone nut can be replaced by a thinner one giving more room for a hub guard. I also made a narrower non drive cone to give more room as well.
It has a thrust bearing behind the clutch, and I've been looking into bushings for the driver.
The lower shots have older B6 ti bolts.