i have a late model 15'4 old town discovery with a 98 merc 6hp. will these things plane? I am thinking its just to skinny.... the faster i go the more she lowers in the back. the motor is lifted 3"s over factory and the prop is the factory one. i ran this setup on a 10 ft lowe and it would go 19mph ;D but the old town hits around 13mph. theres is only a 33 pound difference between the two.