...Hmmm, not a single reply. "Hammer Condoms" got 4 replies, but bedding a sight base 0. LOL!
Well, here's my progress thus far.
Definitely some play under the rear of the base. 3 -4 sheets of paper fit under the rear with the front screws torqued down.
Daylight under the rear portion of the base.
Next I coated the rear mating surface with a release agent. I used two layers of Kiwi shoe polish. I then buffed it off before applying the bedding.