Well, they never failed to hold a surface or ever resulted in flutter. 54 oz. in. torque @ 4.8V. Running 6V adds app. 20% more torque. Consider this, mine weighs 9lbs. So if yours comes out @ the normal weight then they should be that much better. They might still be on special for $29.00 each. I wonder if it was the weight of my plane that wore mine out or just the constant abuse. That reminds me, I gotta call Horizon and see where they are. Joe