Frank, I have snap-on disk 'thing' too! Great trick suggestion for
Have you tried the 1 1/2 inch disk? Perfect for getting a flat
surface on small and medium surfaces etc.Or even leveling shanks,
takes some practice. Although they are not snap on,but screw onto
mandrel, they are indispensable to me.
Only source I know of is A&A jewelry supply:
Their website is yet to open, but here's their email & #:
email@example.com 212-627-8004 post them for a catalog. Item #
etc is: #72-515 1 1/2 " pinhole emery wheels coarse grit (they have
another...fine or med.) Qty 100
I stack two on a mandral, one side down, one up, for real control.