My local hobby dealer recommends me to stay with O.S. if I want to go with 2-stroke engine. He suggests using the O.S.91FX which is 2oz lighter then the .61FX. It comes right at 19.3 oz., same weight (550 grams) of the saito 100. The difference, of course, is price and fuel economy.

Has anyone flown the Giles with a .91FX ?

Pedro