Problem solved...I went with a "Y" cord, and two esc's from the throttle channel. I got 30amp esc's for less than $10 apeice. Only trouble now is that at very low speeds, one motor starts turning before the other, possibly drag induced by some misalignment of the starboard drive, however, I can't seem to correct it mechanically by adjustment. I wonder if there is a potentiometer in those tiny esc's that can be tweaked? It's absolutely imperative that both motors provide identical thrust.