I have one of the RAM units, don't know if it's a "mark 2" or not. When first installed, had issues with it. Due to this, I contacted RAM directly and he worked with me on it. Sent the unit back, no problems found. He sent me a brand new unit, but still had issues. With this, he gave me the gent who designed the unit. After discussions with the designer, the issue was that with the use of a 5 cell rx battery and the Futaba FM radio. Bottom line, contact RAM directly if you have questions on what to do with it.

But to help out, set the controls where you need it and put it in a balloon. Corrosion-x and any other sealer out there should do the job. CRC also makes a nice spray, believe it's the 242. Lowes/Home Depot carry the CRC spray. Don't know if I would put the rubber coating on it since that may void the warranty - if there is one still on the unit. If you, put a dap of silicon on the pots before dipping. After the rubber dries, you can remove the rubber than the silicon and get to the pots.