I have an OS46FX in my Avistar and it is great. While I don't have the skill for the moves yet, the owner of our local LHS flew it one time. He walked up and said "how many rubber bands do you have on that?" I said: "ten" He asked me if he could fly it for a little while. Well I bought it from in the first place so I figured he would be good for a replacement. He did moves I only think about. Rolling circles, snap rolls, etc. This went on for about 5 minutes and then he turned to me and said: "see I told you it could do more than most trainers." I admit, I was impressed.

Still have the plane with the same engine, it just needs a few repairs after our flunfly last week.