I'm using HS-81s on the ailerons. I haven't had any indications of any problems with them at all yet. I have about 40 flights on it so far and it's my favourite plane. I like flying this one more than my higher performance planes -- and it hardly uses any fuel.

I have a 4.8V 1100mah NiCd, standard servos for the rest, and a Magnum .30 4-stroke. It's covered with Monokote, and weighs in just short of 4lbs. It's not a rocket by any means with the 4-stroke, but is a little spunkier than scale. Everything is basically set up according to the plans except for a little more security on the throttle linkage, bigger wheels, and a slightly stronger wing. You'll definitely have plenty of power with the 2-stroke.