Each of us has to decide what we will attempt to fix and what we will pay someone else to fix.
I just ordered a set of these taps, just in case.
I will say, due to 40 years of experience with old/used guns, I always put a drop of oil on the threads of a screw before I put it in the gun (unless it's a screw that's been working loose and requires some Loctite).
A couple years ago I got a used CZ 75 Compact. The grips screws just did not want to turn out/loose. They'd start to turn, after a couple turns they'd get tight (scary, thinking you might be about to strip one out). I'd put a drop of oil in the gap between the screw head and the grip and screw it back in. Then repeat a couple times of a few hours. The screws would come out a little further each time and in the end came out with no damage to the threads. After that, I put a drop of oil on the threads on the grip screws on that gun.
I think the only thing (concerning grip screws) I ever used Loctite on was the grip screw bushings on my 1911's.
Good luck with yours.