[brijar]

Well, the EVX in the boat has 2 input plugs. One of them runs the internal BEC, the other just adds extra voltage, so you can just put a jumper on it to run only 1 pack. The problem with that is the internal BEC can only handle probably 7 or 8 cells I think without getting really hot.

I think I should have specified that I am going to try and use the internal BEC of the MM controller. I am pretty sure that you can use more cells if you cut the red wire, which disables the BEC to the RX.
If you can't run 4s on the MM ESC with internal BEC, then I may just use my 5 volt regulator to run the BEC like I do on my stupid XL-1 (I've had 3 that the BEC's and sometimes reverse just quit for no reason:mad:1).

If I were you, I'd be careful if you're going to run 2p in a boat. I run water cooling on the motors, and the can get rather hot on 14 GP3300's, and will get even hotter with a stock non-water setup. Not to mention 10 cells will be really heavy. But hey, good luck with whatever you decide to do. It really is a great boat!

Thanx,
Brijar!!!