RE: Top Flite 1/7 P-51 Arf retract problem
I have had the problem with a 180 servo and mechanical retracts where none of the servo arms gave the correct throw.
I took the big round output disk and drilled it to suit the retracts so it gave the correct throw. I was already using ball joints so did not have to cut the disk.
I also always use a separate battery for the retracts.