Phillpy, just ask anyone if they are on channel 69. basically you got good radio gear as its FM and 40mhz which alot of people now have but many use AM. its just like a radio station 101.9 fox fm, 101.1 TT FM they all use different frequency. Your on 40.XXX FM but your on channel 69 thats pretty much all you need to remember.
And V-ONE-S your problem sounds interesting but i doubt that there as any device that will control this pressure problem that you have. definetely no valve operating equipments in nitro rc. even the engines dont use exhaust and inlet valves.