I realize mine is only one example, but my 1989 HP would wear down noticably EVERY session I fired it!
It got looser (frame to slide) and the hammer started flattening out where it drags on the slide when cycling.
Then, when drifting the rear sight, mounted in a leather protected vise, the slide stayed "squashed" and would not go back on the frame!
I have never heard of anyone else with that problem.
Being the last year for Belgium/Belgium, they might have "forgotten" to heat treat it.
Hopefully, you wont end up with one of those!
Make sure the "high caps" offered are authentic and not a cheap aftermarkets.
My FEG, on the other hand is going on over 5 years and is still tight, and that was only a $199 gun.
I did, however, just change the extractor in my FEG with the $25 BHP part and the FTE problem that recently surfaced are now gone.