The fact that both servos were on the flaps and both burned up tells me they were binding....to have 2 servos both burn up at the same time "just because" is not gonna happen...I have seen that exact "melt" on the Hitec's once before....the guy had two of them on a rudder and they were fighting each other and smoked during taxi out....about 5 minutes worth...certainly no fault of the servo...it was 100% user error in his case.