What type drill bit, and what size, did you use to drill the titanium liner? I put a clip on my Dozier Workhorse and went with the standard 2-56 screws. Had to use a #50 cobalt drill bit, and the 2-56 tap. Ended up breaking the taps off in BOTH holes! But found out that a couple days soaking in some Radio Shack etchant dissolved the tap and had absolutely no effect on the titanium.