I worked on cleaning it and thought the good off stuff would work well. It did but ruined the fuel tube inside the tank. It swelled the point where it connects to the rear of the tank. I can get replacement parts for it but not sure if I will. This one came with a foam plane I got many years ago. Sometime around 1990. The plane had an AM TX that only had one button. I still have the servo box and TX too. If I can remember I will get a photo of them for you.