i used all standard s3304. i recently upgraded to s9001 in the tail. those with a 6v batt make a good strong fast response. i really noticed a difference. I still have standards in the wings, but those are going soon. I fly a 46.fx with a 12x4 prop and slimline pitts muffler. full throttle provides no flutter. but i also have it propped for slow speed and high thrust for verticals. it also makes for great air brake when i chop the throttle. short field landings are a breeze. i use the tock 2-56 rods with greatplanes ball links all the way around.

sean