I have a Epiphany with L7 and QEV. it is def. alot quieter !!
and dwell is set at 10

Capt. N-F-C

getting my L7 today = )

If you install it yourself, make sure you go to the TechT website and follow the install and setup instructions to the letter. It takes a little while and you need some paint and a chrono, but it is well worth the time. If you don't do it yourself, make sure that whoever does it, follows the guide... It ain't rocket science, but you'll realize a super quiet gun that gives you more shots off a tank than you'll believe.