Vision Impy with MaxFlow 3000 (uses CO2 or HPA at any given time), IPB Fire Fade Delrin Bolt, Wermstick Double Trigger, 14" AA Barrel.
Strengths:
The trigger is pretty easy to install if you've taken your marker apart at least once.
Makes the trigger very close to Angel or Intimidator pull.
Easy to adjust.
An allen bolt stripped when I was trying to adjust the post travel...I emailed IPB and Bill (the owner) CALLED ME LONG DISTANCE to apologize and to let me know he was sending out a new trigger the next day. WHAT SERVICE!!! He called me on a Sunday to apologize. Come on...it doesn't get better than that.
Weaknesses:
Coupled with World Class customer service and great products...Bill is going to get so busy that he won't be able to keep up with his customers!!! That's the only bad thing I can see!!! Haha.
Conclusion:
Excellent product to increase firing rate, lower pull distance on trigger.