I've now got three frame mount, red dot sight mounts.
For what it may be worth, the Neumount (see post #2, second picture) is "very" nice. Mounts solidly, even without tightening the three screws. After bore sighting, removing and reinstalling the mount, there's no apparent change in the original point of aim. The mount surface is very low compared to other frame mounts. The mounting surface is about .340" over the top of the slide.
The Fab Tech and the UM Tactical are nice, fit well (the UM needs "fitting" to clear the P-01 frame corners, they both raise the sight by roughly 3/4" over the Neumount. I like the lower mount surface a little better.
The milling or drilling of the slide is a little too permanent for me right now. I like the fact that I can easily change the sight brand or even remove it if I feel the need.
The Neumount is a very stable mount, worth the money.
Mike
