I have an Avistar with a Skysport 4 in it. Last week it had some radio problems while flying. When We inspected it on the ground, (it landed ok, not crashed) we noticed that the fuel tank was leaking. It seemed to saturate the receiver. I took the cover off of the receiver and sprayed circuit board cleaner on it thoroughly two sepaerate times. The servos still chatter when I turn the Tx And Rx on on the bench, right next to each other. Is there anything I can do to better clean the Rx out? Should I send it in for repair to the Futaba guys, or is it a lost cause and needs replaced? Thanks for any help, Tracy.