cat will have more stability in calm conditions....i would guess the SV system in the BJ26 would work great...

you can also try it with an 8XL and a hydra 120 esc with 12-14 nimh cells or 4s lipos...

someone on the ose forum used a nemisis blue 7XL on 2 7.4v 8000mah lipos and did 46.9mph...

http://forums.offshoreelectrics.com/...t=blackjack+26