Yep, those screws can be a pain in the you know what. I've installed Conetrol mounts on one of my 75's and I like em' a lot. The only drawback to Conetrols is that they're somewhat more difficult to work with. If you're going to mount a scope and leave it, they should be fine. If you change scopes frequently they may not be the best option.
I've heard that Talley makes mounts for the 75, but I have not seen or used any.