Yeah, it's gonna be nose heavy so put all your servos as far back as you can. Elevator servos should go right in front of Stab. Use the battery pack to get it balanced. As far as the engine, you're gonna have to run it richer than we do down here at sea level but not too much. I run a 18X6 W APC prop on mine and it rips the clouds out of the sky.
I hope your G-26 runs as good as mine does. I love it!