just to say these vision impys do rip if set up properly as guys have said previously up the top the right upgrades make alot of difference i was using a normal impy and at the weekend i used a vodoo impulse. They rock, they are so fast its unbelievable and i never chopped apart from firing cause my sock was on lol (the wind blew my i frame and it fired LOL) thats how sensitive you can get those triggers.