ORIGINAL: ChuckW
I had no real balance problems that I recall. With the OS .70 4-stroke, I think I ended up add 1/4 oz. to the tail to get it in the center of the specified range. The way it flew, the CG probably could have been forward some. I've really only had one ARF that I am completely happy with; that's my Hangar 9 Twist. The others have all had bad covering jobs, and other issues. A friend of mine bought the Phoenix Funstar 3D. It was a great looking plane and flew nice at slow speeds. If the throttle was above half though, the elevator and/or rudder would flutter, causing the plane to shimmy bad. He's a pretty experienced flyer and found no easily fixable cause for the problem. I know there are probably plenty of good ARF's out there but kits just give you more control over the finished product in my opinion. Plus, if something isn't straight when I build it, it's my own fault. As for the Sukhoi, I'm probably going to go for a Goldberg kit once I get my other projects done.
I was thinking of putting a OS .70 4-stroke, too, looks like it would fit in with the specs. I have not started to assemble this ARF yet, I'm just trying to get as much info as I can before starting.
Thanks guys
roltech