I went back and fourth countless times with CHPWS (They were excellent each time). The last time I sent in my whole slide (stripped). The screws were too long and hung up on my extractor after so I had to disassemble immediately.
Anyways, after that time I ignored the torque reading and cranked down the plate as tight as I could, if I remember right, I did this out of anger. Resulting in one of the screws to round off the Torx portion. The threads on the screw itself held fine.
So basically, I cleaned them again, added blue loctite, and just cranked them down. It has been thousands of rounds since then and I haven't had an issue.