is a us41 a good gas engine to use to fly my bricks.........i'm 68 and this is it. i have 2 and 4 glow but i tend to build heavy. even my 120's struggle. i'm in the middle of a f4u and it will end up heavy. a new one from TH with flyer discount seems ok. 2 yr warranty,spring start and pitts muffler. what do you think, 1st one and probably last. thanks
tinker