I have a saito 80 in mine with a futaba 6xas with regs all around and a high tork for the rudder. I have max throw on all surfaces Im not sure what expo I have it set at but its low except for the rudder but for the first few flights set it on the low throw they reccomend with the expo they say to use. the os 70 should be a good match mine hovers at less then half throttle, but i have a ys 91 sitting here so I might buy another and just go crazzy!!!!