Thanks for the info, I am using one of the 12.75X3.25 props on my OS46FX so thought the .53 should be able to handle a little more but I will try that prop on it. I rechecked the CG, I had about 3 oz. of lead on the tail with the OS91 and took all of that off and the CG came out at the rear of the wing tube socket so maybe 3/8" or so behind the spar. I just added about an ounce of lead behind the firewall this afternoon and will try it again like that. When it was flying it appeared that the tail was down a little bit and then on a landing the tail wallowed around a little bit and I didn't notice that before. It could be that I might have gotten the incidences off a little on the rebuild too. Thanks for the ideas on break-in I will try that.