I run this with my 3905 E-maxx Monster brushless............and i use it for my boats (receivers are only $20) and have never, ever, ever had a problem.....not one glitch........boats go til i can barely see them. I have no fear anymore of signal loss due to distance. I had one of my rigs glitching so bad with a Futaba radio and reciever and i hooked this unit up, and presto.........perfect. It has a steering end point adjusment along with your trim adjusters for steering and speed. Takes only 4 AA batts.

http://www3.towerhobbies.com/cgi-bin...?&I=LXWPW0&P=7

P.S. - i was wondering this myself............................ are you running the two 700's with a stock EVX? I was wary of that so i went brushless..........do you think the esc is putting up a fight trying to power two 400 watt motors at the same time?