Hey Bembo9 perhaps you are thinking along my lines with scale combat? I fly 1/4 scale WW1 and You have to be real careful even when you are simulating combat. I have seen video threads where they put a wireless transmitter and use a headset monitor and you are flying from the "cockpit". What if you used some sort of laser tag device and could get it to activate a servo on your opponents plane which would set off smoke? You would fly around until you got behind your opponent then use the monitor to line him up and fire. A company called Sky Dart has a ground counter but it seems a little pricey and there are those Fighterbirds which I think use some kind of sonic devise to shut down the opponents motor ( not good for 1/4 scale) I know those full scale warbirds you fly in have some sort of sensor that sets off smoke when you hit your opponent. This might be a stretch but I don't think it's rocket science. I know it's a hoot flying the big birds in a scale fashion and and adding the combat factor in a safe way would really get some attention at meets and fun flys. Any ideas?