I have the FG-30 ( the one with the bubble problem ) in a 2m10 Stuka and in that it's perfect, I also have a 'few' 2 stroke gassers, you MUST put a proper silencing canister on them, or you will become deaf in 10 minutes if you haven't already been shot down by an F-15, hunters with a 12 bore or clubbed to death by the club members,,