Great plane, this Sukhoi 31 by VectorFlight. Had one and loved it until the mid-air. Had an OS .91 in mine and was too much power. Your 4-stroke .91 should be a better choice. I will order another VectorFlight for my OS .91 but next time will be a 66" wing. Only thing I will mention is that the gear was very slightly rearward causing many nose overs on our grass runway. I moved it forward by about 1/2" and all was corrected. Really loved this plane and you will too (if) you like speed and sensitive controls. Will do anything you ask it to do.

Good luck, I give it a full thumbs up!