I'll get the pics up later this afternoon, but I found the problem was that my receiver has low spots at the screw holes and the Leupold base does not extend past the holes enough to bridge the low spot. When the screws are snugged down, it pulls the rear of the base down, hence the tilt.
The area is so small that shimming would not work, there just isn't enough bearing surface on those skinny receiver rails, and trying to fill the low spots would just cover the holes. I'm too cheap to have a smith true the rails plus I dont want to have it cut on. One other thing I might try as a shim though is to wrap the mounting screws with some thin wire strands to make a washer of sorts. If that doesn't work, I'm going to try the Waever Grand Slam 1 piece base. I figured with being one piece, it won't be able to tilt.
