All seven servos should be standard size. This is not a small model. Because of the two .40 sized engines this model is essentially the same as a .90 sized model or a slightly larger 60 sized model. Larger servos are not required. 7.9 lbs good luck. Mine is almost 8.6...but I have slightly larger engines. OS 70 4 cycles. two 40's will be plenty of power. wils is "flying" with that configuration. I currently am not, so maybe 40's are a better choice I currently am still having troubles. Please keep checking back and let us know of your success! We need encouragement. I don't want mine to turn into a hanger queen.

An update on mine. I got the engine mounts replaced now I just have to muster up te courage to go to the field with this thing again!