Hi!
I think you would do better with a 120 on that plane at that altitude if you need any nose weight.
This would be a different topic but for kicks & giggles I'll post my plane's specs.
Plane: Doghouse Extreme (*very* minor structural mods)
Weight: 4.59 lbs (dry w/ 12 oz fuel tank)
Wingspan: 56"
Wing Loading: 13.85 oz/sq ft
Wing Volume Loading: 5.99
Wing Area: 778 sq inches
As you can see, even at this altitude this plane should be as close to a rocket as it gets with the Saito 100
BTW, the plane is built with contest grade balsa and *many* fiberglass, carbon fiber and kevlar reinforcements, so I don't think it'll blow up that easily.
I'll fly her maiden flight on Sunday and I'll post the prop results in this thread and the flying characteristics in the 3D / Aerobatics forum.
.... I wonder what this plane will be like at sea level !!!!