The 13 foot double layered bottom Kaboat is working well for us, especially combined with the 52 pound Suzuki 4 stroke 6 hp motor. With 7.5 x 6” prop it will do 13.5 mph with just me aboard at Lake Powell & 10.5 mph with both of us. The double layer bottom does increase it’s weight to 80 pounds, which I can still handle though the 12 footer at 50 is much easier.