Yeah, call me a "motorhead" :devious: , but there's nothing like having "bail-power" confidence, in a vertical attitude, 2ft off the ground. X-tra weight, not an issue w/ the Saito's lgt. weight (less than the YS 120/140) and the UCD's lgt. wing loading. The only drawback I would assume woud be it's fuel consumption, (which would probably be just a little more than any .91-2cy) but w/ this diplacement you could run as low as 5%-10% ntr. at a low throtle setting. Furthermore, you get to swing a big, fat prop to cover all those thrust vectoring surfaces. Will it work? Sure it will. I've got an U-Stick .60 w/ an OS1.20FSIII (which is also heavier than the 1.80) that I hover/TR all day long. Pogo's up & dn the runway are a blast. Punch it and GO! Tail weight?, You bet!!, try 3-1/4oz's not an issue. And I'd like to add a little more for some added fun! Anyway, that's the powerplant I'll be usin' in mine, so there! :bananahea