RE: which brand of engine is the "best"
I have a Four Star 40 with the O.S. .46 AX. This engine runs perfectly, and has excelent starting qualities. It flies my 4* beautifuly, and if quick is what you want, than this is engine is perfect. Just screw on an apc 11x6 and away you go. I run mine with 15/18 powermaster fuel. It idles very nice and will idle even better wiht 15/20. Go for the AX!