You really should have bought the Villain EX. It is much faster, due to the 550 motors versus the 540's and the EVX Marine is a much beefier ESC than the XL-10 (I think that's what it is) and having 4 7-cell packs to run, you would have much more speed in the EX, and with the cooling time between runs, you might be able to run those packs back to back with little down time.