Hi Ed, the problem with the ailerons is all four are controlled with one central servo, I can get plenty of throw from the bottom main ailerons but the way they have the linkage set up so you only get about half the throw on the top. They have you cut down the control horns and mount them on the top of the ailerons so if I mount them on the bottom I will get much more throw. I haven't fooled with them yet but if I use the horns they supplied it would give me too much throw if I reverse them. I'm pretty sure that is the cause for the nasty rolls. I have the CG dead on the center of there marked CG and I hard mounted everything to get it there so I will need to buy some new lead strips to start fooling with that too. I need to finish up the Satyr I built and get that covered next and out of my shop so I can move on to the next build. In the mean time I will fart around with this little one and see if I can't get it to stunt better. I'm used to flying my little AW Extra electric and I shouldn't be comparing the two planes. The little AW is a perfect machine but they are apples and oranges. The other Ultimates I have built all had 4 servos on the ailerons and had a very nice roll. I'm pretty sure the ailerons are the problem. Can't have two at 15 degrees and two at 6 or 7 and think it's going to roll right. I knew it wasn't a good set up when I put it together but I did it to the plans/instructions. I also have to keep in mind it's just a goof off plane to have fun with. I will change some things and see if I can't make it better.