I thought this would be an interesting topic...not only that, I'm close to cutting out my elevators for my 1/4 Lanier Extra 300S. From a percentage standpoint, the plans call for approximately 30% of the horizontal stabilizer to be used as the elevator with no counterbalances. I am assuming this would be inadequate for 3D flying. Does anyone have any suggestions for control surface sizes for the average 1/4 scale plane?