When I used the Excelleron 90 throws recommended for initial setup, they were way too much. Luckily on my first flight I had set my dual rates to half of that the amount. Still too much on the aileron so I'm now installing longer aileron horns.

I forgot to say in my original post that I used a fiberglass pushrod instead of pull-pull on the elevator. So it's my guess that anyone planning to use a YS 120 in the Excelleron 90 should be prepared to add weight to the tail

Allan