I have a TT .91 FS in mine and it's plenty of power. The TT is pretty heavy, too, so if the weight isn't much different, it should be fine. There's a lot of room to move the servos around in the fuse, so mounting them in the tail may not be necessary.

Don't expect any 3D capability from the 4*, as it wasn't designed for that stuff, but I can say it is one of the best flying planes I've ever had. And I've had a lot of them over the years. The plane is SUPER stable and landings are easier than you can imagine. It just floats and slows down and floats and slows down and...