archie
the 120 will be ausome power to weight ,but there is that cg factor,you will most deffinitly have to add weight to tail,i dont think there is much in weight differnce between 120 and 110,and also the 91,i would weigh mine but the capiche 120 is housing it at moment,give it a go,i dont think anyones flown it yet with 120.
mike