By having to add 11 ounces to the nose (which means there is more weight in the tail than necessary), then you will be coming in at about one pound overweight--which is going to increase your wing loading substantially. Maybe not quite a pound since the motor is definitely lighter than an evolution. However, the motor isn't more than a couple of ounces lighter, I'm sure. I'll have to check out the weights of the two motors and get back to you.