Good design is everything. M2 is really really well designed and thought out, and its performance speaks for iteself. Full pressure or low pressure, if youve thought the design out then both should be equally effective (me thinks anyway:-)

However, I rekon if someone were to put the same kind of thought and planning into a FP setup that Paul Cooper put into M2, then wed have something pretty terrifying on our hands. Oh wait- thats gravity :-)

Seriously tho, buffer tanks and big valves for massive flowrate are the way to go. and the more efficient this (reletively) new technology becomes, the better! The future looks good for flippers, and not so great for arenas:-)