Borden, you are the man!
Sure enough. I removed the front base and measured the screws. 3 were .410, 1 was .380. I took the 3 longer ones and put them in the rear. Took the 3 shorter ones from the rear and put them on the front and PROBLEM SOLVED! It seems stupid for the leupold folks to make mounts with such minute but significant differences in their mounting system.
