In years past the buggy, truggy and MT classes all had the nitro and electric running together. The only class that I was aware of was the "Brushless Open" class which was basically any brushless vehicle you wanted to run.
There is alot of local nitro racers that will be there so I am positive that nobody will be excluded. At this point in time most of us are racing our electrics in the "nitro" classes at our local tracks. The nitro racers are tolerating it and allowing us to race with them so it would be pretty darn impolite of us to not accommodate them. I would personally object if they told anyone they couldn't race because their power plant didn't conform.
The best part of the RCM event in my opinion is nobody gets left out. If its an off-road vehicle there is pretty much a class you can race it in.
Tell your buddy to come. He will be able to race.