Only .005 off with full spring load?

That's really good.

If the adjuster screw were right at 1 turn, it might be even closer.

As a little test, you could set the adjuster right at 1 turn, then just fill the gap between the roller and valve with feeler gauges.......then check the lift at the retainer.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads