10mm has an FX-1 with a 701, B pipe, and stock pump. he says it has an 18/24 impeller in it and says it jumps out of the water so bad he can barely hang onto it. :dunno:
its all relative - I don't think he's ridden a big pump ski
I've ridden a 122mm FX-1 and 144mm FX-1 side by side - huge difference in low end response. The midrange and top end can be really good with either pump