Oh, sorry. Thought you were talking about the electric.
Stuff looks good!
Cool price, too:
http://www.horizonhobby.com/Products...ProdID=PRB2825
http://www.horizonhobby.com/Products...ProdID=PRB2824
As for the lipo, that's not really for speed records. Especially with that motor.
I was saying that the boat will like to run more out of the water (lipo's weigh less) and you would probably get more runtime. Seeing as this is a sport boat, that seems like a good idea.
I'm not sure how the SxS packs will do, ideally you would have 3 cells on the bottom of each sponson, almost touching the transom to move the CG back to where it needs to be, instead of the stock location.