HI
I have been using the excelleron 90 with an OS120AX and it is an excellent combo. the 90 is an easy build, I used everything except the supplied hinges. Those I changed out with great plane pinned hinges. plane flys well but you need a computer radio to smooth the flying as it can do 3d with the best of planes. The OS120AX works great right out of the box. I can do a knife edge loop, no problem.
please note other posts in pattern that the new focus II ently level plane is coming, and I can tell you the Focus II is a great pattern plane.

Also, if you go to hobby people a lot and the have a 90 on the shelf offer them $175 to $199. I got my last one at $175.00 !!!