TT1900 you are right, But I have had a couple, Hamm.215, a 22 short , forget the # That 215, used from tradex years ago is the only gun I have shot that never had a misfire, FTF , ejection , in a case or so of ammo, maimly fed.gm, or baulk, I have never shoot in compition.
I have some Hammerli exxe/ mags that I made work in the older models. I never had any waights, the safty never worked, but never use them on my range anyway.
The 41 is nice, don't like the grip, can be fuzzy with ammo, The Medalist is nice and just a challenger with fancy wood, Thou I do like them
The GSP also have to be checked real close for cracks in the frame, more common than on the hammerlie's
I shoot a lot of Hi Standards, as I dealt/ collected for years, if you know how to tune the mags, they work 100%, I really like the Olympic's , but that is a different thing.
Most of the guns I have had are old ones, and mags , parts are a challenge, a bit of DIY
I have had a couple of Old rugers MK1 targets that had very nice triggers, not match grade , but for a informal match, O.K. A lot of younger shoots can't get on to a set trigger, or a few oz.
The Pardini,I can't comment on as never had one, had a Unique one time that was a super gun, looked crappy.
If you are worried about parts , 41 would be best, A OLD ONE in exc condition would be better than a new one from what I hear.