Thanks all. And Dave that Tripp P/N has a welded on base pad. The Tripps welded base pads are pre drilled with two holes for installation of after market base pads. Like Dawsons, Ed Brown, Wilson. The Tripp poly/alloy base pads will not fit onto a Tripp welded mag. They are secured with a spring plate, which you can see in the second picture I posted above.
I was really hoping that there may have been some "unicorn" Tripp mags. With removable base plates that were standard length. That would make the Tripp's the best. My biggest problem with the welded pad's, are I have several that have been stepped on and the body gets slightly deformed. No proper way to fix then. Now if I could get that pad off, easy repair. Thanks for checking.
CC