I have used that engine when it first came out 12 or so years ago. It puts out much more power than the 120 Surpass III for sure but the old YS120AC was a much better engine in its time. That is a very heavy engine at 1050 grams if I remember correctly, so you need to balance your plane carefully. And it vibrates a lot so a good soft mount is a MUST. Your best choice would have been a YS110. A YS140 Sport or OS120AX, while not ideal, would have been better, not to mention cheaper alternatives in my opinion. Having said all that, there's no reason why you can't make it work. Just use a good soft mount and mount your servos and batteries as far back as possble. You may have to make a hatch at the rear of the fuse and mount your servos there to minimize the dead weight you will have to add. And believe me, you will have to add dead weight to balance it correctly. Good luck!