On the subject of the giant P-47, you may also want to check any extensions you may have. Have a Ziroli corsair with a G-62 that had developed a very similiar problem to yours. Setup had flown and range checked fine before. Disconnecting channels didn't locate problem, only thing consistent was the enginge needed to be running to cause problem. Changed everything I could then gave up for awhile. Eventually found a bad extension(a long one) in the aileron connection. A new lead solved all problems.