Thank you , lens has a ridge on it , so at the very least AI
Merco_61 , is that RC related or Control line ?
Merco_61 was a good stunt engine ... ( Probably still is )
F2B, I have two of the double-plug Super stunts still. One is from the Premier plastics era, the other is earlier.
I have flown and competed in all classes with a B in it except scale. (Wakefield, stunt, soaring and electric soaring). Unfortunately I don't have the time available to be competitive anymore.
/Peter