I went to go see the ul1 at the hobby shop yes it does have a huge turn fin but the steering gear is all plastic vs the aluminum on the custom boat ... and the motor is smaller, and the overall boat is smaller, and the custom one has higher rated amps esc it has a 90 amp cont. vs the 60 in the ul1. Does all this stuff even matter? im not sure. Im just trying to research and get the best for the money. They have a cheaper one that is 28 inches long it's not much more $$ than the ul1 . how hard would it be to put a turn fin on the custom one?