I flew mine for the first time today and man that saito 91 sure kicks ***. Hovers with no problem (about 1/3 throttle) with plenty reserve. First time i actually brought any plane down on the deck and torkrolled then pulled out with no problems. Cant wait till this engine breaks in

Gbee
Mine made the same drumming noise that you are talking about. I thought that it was just the plane being overpowered and the vibrations were just making that noise. My buddy has a saito 72 and his didnt do that. I just ignored it and flew that crap out of it. Got 10 flights in today. Plenty more to come

Santi