As noted in the "other" Caiman thread, I do like both of mine, note, the word, "both".
I can't help with the trigger adjustment, as both of mine are more than good as received from the factory. Nice light take-up, crisp, short let-off. I don't have a load gauge so I don't know the actual pull weights, but it's not bad at all.
To those with super sensitive hearing, I wonder if a layer of automotive sound deadener in the stock might help quiet these sounds. I have some left over from a car that I'm working on. I'll see if - 1. there's enough clearance between the stock and the receiver, and 2. if the sound deadener does anything, (it should). But on the other hand, since mine don't seem to be noisy, I may not be able to tell..! I'll check the fit in any case.
I DO know, that it makes a huge, positive difference in the Walther Reign. I put a few pieces on the inside of that stock, it made a very noticeable difference in that guns odd sounds. Those I did...hear !
I removed all of the factory baffles from my Caiman, and put a short 0dB suppressor on it. It's very quiet now. Note that it's not shooting at 900fps either ! I put two of the removed baffles on the Caiman X. It helped a little, but it would be nice if it was a little quieter. I don't want to add a bunch of stuff to make the length outside of my self imposed "bullpup" length of 30". Back when center fire Bullpups hit the market, they were...pretty short.
Mike