you assume much
You only need one aileron servo on a 33%er and i have felt the power of an "old " zdz 80 on a 24 pound plane and it is impressive.
Not sure what it is I assumed. On the 33% WH planes I referenced, you need two aileron servos not because of torque requirements but because of flex in the aileron. In their stock condition, they are no where near stiff enough to go with only one servo.
As far as the old style ZDZ80, I've flown a couple 33% planes set up with cannisters. They weigh 23 lbs and 23.5 lbs. It didn't seem like they have any more power than my WH 260 with a 3W80, which isn't overly impressive in the power department.
Either way, best of luck with the 33%er you mentioned.
Dan