2 things...
1. You don't have to refill a blower... (Down here, a refill can go for 25-30 bucks)
2. You never have to worry about getting lined up next to a nasty LS1 with an empty bottle in the back...

__________________
Uncle Sam
"What the hell is up with all the gauges?
Calling Captain Kirk, your ride awaits... Phasers on stun...."