There is a new rx board to be confirmed compatible with 9x (FlySky protocol).
Not by me : http://www.rcgroups.com/forums/showp...8&postcount=35
Vitality H36 H36-1 RC Quadcopter Spare Parts PCB Receive Board ($12.60)
As you can see, ther are no motorplugs.
(I've just ordered one to see if it's better than the v939)