Custom 1982 Maxim 650

Good call on both accounts, k-moe. I have grommets in the garage, not sure why I didn't think to put any there. As far as the countersinking goes I was nervous about removing too much meat from the plastic. It's holding well though. Maybe between countersinking and using some 1/32" adhesive backed sheet rubber I can protect the paint after all.
Hogfiddles, I don't think the chain is going to stretch much either. If it does it'll be the brake side. There is a lot of tension going on there during braking. Actually, I'm still messing with that side to get the brake adjusted right. It needs a little reengineering. Your post does remind me that I never put up and closeups of the setup though.

 

did you shave much of the foam out of the seat? Looking to do the same thing as I'm over 6 ft. tall and am sick of sliding forward on this seat.