It IS gonna rock. I see limits at 7 pounds and I would be happy at 6 pounds. You will be in the heavens at 5.25 pounds !!

Seems like you will have all the control authority you will ever need and the power needed to do what you want to. If I were you, though, I would consider trying a 0.61 because of the very little added weight.

I have found that this airplane torque rolls rather fast but still controllable. The point is that when the airplane is in the exact ideal position, it starts to roll real fast and becomes uncontrollable (about two revolutions per second).

I wish I could still be in the constructing process so I can lighten her a bit...