Hey, Khiem, good choice in mounts. One other thing that no one said yet, make sure everything is squeaky clean. I use brake cleaner to make sure there's no grease on anything. Denatured alcohol works well also, but with the brake cleaner I can really blast out the rings/mount. You can either let it air dry or give it a blast of compressed air if available.
Scott, just noticed your PM. Get the BKL 260 with .007" compensation. I just put mine on my CFX, at 10 yards it was dead on for elevation and 1/4" right. For a 30 yard zero, that's about 1" high, well within the range of the "sweet spot" for scope adjustment. To answer your question, I'm just going to hang on to everything for now. Never can tell when I'll just HAVE to have another rifle :-) ! And for anyone interested, the barrel droop on the CFX is pretty close to the same as my Diana 350. I can just about swap scopes without haveing to re-zero. So does a fixed barrel CFX have droop? You decide :-)!
Dave