i dont believe 2.4 should be impounded in any way.. I do believe local clubs should make slots for your AMA card to show you are a member and you are on 2.4 to ease everyones mind. At meets, i think 2.4 pilots should register with the impound and recieve a special colored pin to keep, this pin lets everyone know on the flight line that you are on 2.4.. This should work flawlessly for meets of less than 100 pilots.. Jury is still out on the larger meets of 200 pilots or more on "can you get a channel" when you turn on or "how many radios" can be on together but i dont think there is an issue with a shoot down.. I also think the FLIGHT LINE personel should police who flys, how many times you fly and make sure everyone gets a turn, NOT the impound that is not the impounds purpose. Russ