If you want counter rotating 3-bladers, GWS has them in 7" and 6", if you can get them. I've been using Dynam ESCs, which I believe have a 3A switching BEC, all the way down to the 12A size. I never thought about it, but I wonder if the switching BECs can be combined? I know that shouldn't be done with linear BECs, but maybe it can be with switching. Irregardless, you could quite possibly run 9, 4.5gm servos from a 3A switching BEC, granted the 3A rating is actually correct. I know firsthand that the Eflite 30A Pro ESC will run at least 5 of them, and I believe it has a switching BEC of only .7A.
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