I have my first 4-stroke now in a sundowner and have not had the opportunity to fly it yet. A buddy of mine has a couple and he can do stuff my two stokes do not want to do. Like come in for a hover at no throttle and hit the gas and it responds quick. But I have also stuck my two stroke .61 thru the roof of a mans car pulled it out replaced the carb and fired it right back up. Hope the 4 is that durable lol. But they sure have alot of torc. Mine is the Saito 180. I am fairly new and pretty motor wise (auto's with carb's only) so setting the two strokes is no big deal and I set my 4 and my buddy came over and he gave it a couple more ticks one way or another it just so smooth up and down over the 2.