quad thruster

excellent.
check out bonzerworld.com,
bonzer5.com and surfy surfy to see the modern high performance shortboard bonzer ridden by a lot of pros in big hawaii/california barrels.Malcolm Campbell will tell you how to shape one,and he and his following swear they are better than thrusters for many reasons.
there's all sorts of info out there on the internet.
They readily admit to being misunderstood.
They were invented to be used in big barrels,yet they got 'sprouted' into being fun retro,which is totally wrong.
They consider themselves futuristic,hence my responses.
I like 'em because I don't like Thrusters.
I'm not saying the Bonzer works better,but it might !