Duane...
If you're crafty enough to make those shims, perhaps you'd be interested in a resolution for the
kayfun-fixed-pin problem, and be done using the shims?
Check this out:
How to close the gap under the Kayfun Lite
(This didn't involve grinding the pin. It was much easier than that!)
As of finishing the steps listed there, I can now use my KFLs on my non-flat cap v2.5's, without having to put a shim of blue painter's tape under my beauty rings.
I had always wondered if I'd get ALL my v2.5's converted, and I did. Except these two...because they have color matching slanty top caps. The black one is an authentic VaporForce Stealth Mini (from before they married into Provape), with matching custom Cerakote'd KFL+v2.
The green one is my original Bronze Mini, which I rescued from an abuser. The coating was in very bad shape. So I tore her down, custom coated her OD Green, matched a KFL+v2...and sent her home to the Mothership for a paid spa treatment (reassembly). While they scolded me for taking her apart (had to clip the wire between cap and board), they also marveled at how awesome she looked in this color combo. (All handled without phone support by the way...

:but not banana popcorn cuz eww: )
I dubbed her the Soldier (cuz she's been
through so much, and cuz she's Army green)...I think she makes a great compliment to a Stealth!