Countersunk seems to be a better configuration than buttonhead...
The smoother profile would be less damaging to ankles, since I don't make clutch covers...
That piece of scrap aluminum was enough to make five retainers...I only need two, so I have three extra...PM me if you want one...I'll mail it to you for free, with a matching screw...
Fits Comet clutches perfectly...too large an OD for Hilliard clutches, but I'll be making some for Hilliard later and will have extras...
I don't know the OD needed for MaxTorque clutches...I don't have any, but if you can measure one, I'll tell you if these will fit properly, or I might even make a few...they're cheap and easy if you have the right tools.