Whoops..didn't see the issue regarding tightening.
As a FSA owner (Team Issue '08)who HAD his crank arm come off on a ride (and didn't have the allen wrench to tighten=a 6 mile walk back to the vehicle)and who had a friend have his come off on a century ride, might I add..
Tightening and locktite ARE critical.
I had the 'best in the area' LBS do mine and have them go over that issue every spring before the ride season starts. This is one of those areas (tightening to the correct specs) I'd prefer to let a pro do.