Fantastic pistols, I have had one for years.
If the trigger is not to your liking then the whole pistol can be very easily stripped down to alter things. Just be careful about setting the trigger too light as this can lead to things going full auto, releasing all 5 shots in a very small fraction of a second.
I am working on getting a fully position-adjustable trigger sorted out for mine which shouldn't be too difficult as the blade is dovetailed in the same way as the AA S200. I have also had the top of the housing drilled and tapped to take a red dot or pistol scope on a length of weaver rail.
Have you got the hard or soft case with yours? I want to try and get a hard case for mine at some point as the soft one, although perfectly fine does feel a little flimsy.
AA s200 with BSA contender 8-32 x 50 - .22
AA S410 with 4-12x44 MTC Viper (.22 and .177 barrels)