NoBrainer:

You gonna make an optional military version of the hovercraft with the gun tubs like the few that got used in 'Nam, Hover Tim?

I gotta admit, I understand the concept too... that it operates two channels at once, moving the tail rudder as it adjusts the power feed to the two front motors. Its ~getting~ there that baffled me so much that I traded away the rare Futaba 6EX surface use Tx because I couldn't program it. Tamiya's manuals use better english these days, but the level of detail is poor still. Bet if I'd looked online someone whoud have an 'Newbie Guide to Channel Mixing' somewhere... (We're not idiots, are we?)

I may get a mixer box just to play with it, and perhaps to upgrade one of those twin-prop toy boats Mato sells. that or use it for my PT boat to help it turn (Upgrading a Lindberg 1:32 scale '109' kit)