^as subject states: have you guys ever just NOT been able to get a screw loosened?
For background, I recently got one of the pink, breast cancer sprint runs of the paramilitary two from 2016. It was when Spyderco was still using red threadlocker, so I had it sent in to have the screws loosened. When I got it back, every screw I could get loosened except for the lock side pivot screw. Thought maybe a mistake happened, so I sent it back. Got it back today and STILL can't get it loose. I can tell that they did indeed service it however, because a new screw has been put on the knife.
I've always been able to disassemble my spydercos (even when they were using the red Loctite), including several pm2's, so I'm at a loss at what else to do. I've tried both the soldering iron and hammer method before sending it in the second time to no avail. I can put everything I have into trying to loosen it but the screw won't budge, so much so that my driver started to leave an impression at the "bottom" of the screw head, but the interface between the driver and head is starting to deform a bit.
Anyone have any suggestions on what I can try or why this "seizing" (if that) is happening? I'm about to try locking my driver in a vice and using the knife as a lever, but I am convinced it will strip the screw. I want to have the option to sell it should I decide, and can't do that in good conscience if a strip something.