I think that I would give it a go. I gotta say I liked it when I had the .46AX on it abit better, it flew lighter. Go with you're .91 Surpass, and move the battery back under the canopy for balance. The build was good, The wing sheeting is thin and you have to be careful. I put a thumb through mine in the center secton a couple times. The plane is very strong when you have it all done. You might consider a Saito engine, perhaps the Saito .82. It is lighter than the .91 and has almost the same amount of power. I personally dont have any expirence with saitos, I'm just looking at the weigh and power difference.