Here is a picture of the gear mount I described. It's on my Seagull Spacewalker II, but I used the same system on my Sukhoi.

I forgot to mention on the Sukhoi that it balanced as per instructions with no added weights. Also, I used the recommended throws to start with. Soon I increased the rudder throw to about all it would take to get nice snaps maneuvers and Hammerheads. I used about 3/4 of the aileron throw; I'm not a fan of rolls too fast to see; I like smoooth maneuvers.

See my Spacewalker II post for other ideas.