I appreciate all your input. Fact is I hate threading. I'm trying to get away from doing it at all and when I do I only want to do it rarely on metal and semi rarely on anything else. Its about the riskiest part of what I do. I've been very lucky really as I've learned a lot from doing it many many times but I've also been very fortunate that tap breaks have been few for other people's property and mostly stuff I did on my own knives. Often times it is difficult to thread already hardened steel liners. Titanium has a tendency to gall and hug taps the deeper they go so threading thicker Ti requires lots of OJT to know how to work with that material and over time I've gained a lot of that. What I do in cases like yours is simply say I don't know.
It depends on what the only gauge I have tells me once I drill the first hole. If a cobalt drill will put a hole in it I can probably thread it. If not and the hole would require a carbide to drill out then forget it. Its not going to thread but will likely break a tap off and lodge it in there getting it stuck. So the risk is there, always regardless of how easy it is or how easy it appears to be. I tell everyone about this risk. I bat a good average but you know, life throws you curve balls at times and things can easily go south when modifying folders.
If you decide to proceed you should look over here if you have not yet done so and once the form is printed off after being filled out mail at your convenience. Thanks for stopping by and asking about it.