I am new to the forum but not to aircraft. Been flying for 50 years now both professionally and just for fun. I fly a Van's RV-4 and use it for cross country and aerobatics and formation flying. I got into building smoke systems over 30 years ago and now have what I think is the best inventory of sm...

I am new to the forum but not to aircraft. Been flying for 50 years now both professionally and just for fun. I fly a Van's RV-4 and use it for cross country and aerobatics and formation flying. I got into building smoke systems over 30 years ago and now have what I think is the best inventory of sm...