Response from ACT-LABS...
"We cut the trigger in the factory as the longer one will easy to break if the gamer is holding the bottom part of trigger.
Well.. I have the early version of the new act-labs gun (PC version.. with the long trigger). The early version had problems with most PC monitors but I believe ACT-LABS have fixed the issue now. I have some electronics skills, so I fixed mine by myself.
Not long after fixing the calibration problem, my trigger broke. I wasn't happy after spending so long fixing the electronics, then the trigger breaks the second night the gun was used! So.. back to the drawing board..
The trigger design is poor I think. It 'slides' back and forwards, and it's not quite a smooth fit so it sort-of jams in the gun. I've had my trigger replaced with a metal one that a friend of mine knocked up. The replacement 'hinges' inside the gun instead of sliding. It no longer jams, it's faster to use, doesn't hurt your finger and 'feels' better now that it's made of metal.
I like the act-labs gun, but I was disappointed that I had to do so much work to get it to the point it's at now, and I don't think everyone is going to want to open their brand new gun, rework the board (surface mount rework, too) and hack in a new trigger to get it to work properly. It's like it wasn't tested properly before being sold. (I believe the boards don't require rework anymore, but I don't know..)