lv2rcav8:

I can tell you that the BME is a lighter engine and in the AW 33% Edge 540T (I have the same plane) you have a choice of either a pull-pull rudder setup or mounting the rudder servos near the tail. The manual tells you that if you use a lighter engine (such as the BME or DA100) you will come out tail heavy if you put the rudder servos in the tail. So the only thing to be aware of is if you use this engine, the preferred method of rudder servos would be a pull-pull setup, with the servos mounted in the fuse, near the wing. (Which in my opinion and 2 cents worth, having a pull-pull setup on this plane is a better choice.)
Good Luck!