Yeah I have a 5'8" spitfire and I would let my friend use it some in the winter only because i was to busy, so whenever i would surf it it was a thruster because thats what my friend changed it to. I could not figure out why but when i would go for a turn it would bog down and I could not gain speed at all, so i switched it to quad and it works wonders now.... Everything flows and Ive been doing some of the biggest turns i have ever done before.