I want to put a scope on my 6 1/2 ruger blackhawk flattop 44mag. I called weaver the mount they had that didn't reqirer drilling and tapping of the flattop were only available for the regular blackhawks. Do any of you know any more companies that don't require drill and tapping the top strap? If not thats fine. What are your favorite types of mounts that have to be drilled and tapped? Also when the top strap is drilled and tapped, and you take the rings and bases off does this actually weaken the frame in the gun a little bit. Anyways guys thanks for the help