Apologies for the long delay! I got busy and the whole topic passed my mind.
I appreciate all the help! It gave me alot of stuff to think on.
What I'm sorta planning is to shim it. Just large enough to keep some tension on the scope mount, (possibly) screw the mount to the shim and keep it centered. Then epoxy/meld for a slighter tighter bond.
HiBC: I agree it should I and a few other people looked it over very closely. It SHOULD be a perfect fit. NO high spots, dirt, metal spots,etc.etc. Perfectly smooth
It might be awhile before I do alot with it. For now the electrical tape is working good (a week of riding in a pickup and getting generally abused), so there's no real rush on it. Although I DO plan on doing something better, I think that would work okay, as the tape seems to hold up pretty well to the elements and still hold stuff secure.