Thanks.. The FG-21 has taken out 2 air frames and almost cost the 47. Just could never get it to keep in tune from new, it was sent back to the distributor for a new carby and ignition system was fine for a few flights then cam back with problems.. Not used it for 2 years Thought I had it sorted but it kept dropping tune.. Gave up and refitted the OS 91fs.. and now the FG21.
www.youtube.com/watch?v=7KtqbGUc3kE