side profile shape looks pretty good, so the only things that might cause issues are the rudders so close together and maybe in future builds angle the sides of the hull, not to much you can do about the weight since it's built so I'd say if it runs good enough on water that you enjoy it then leave it alone, if it's not fast enough for you strap a bigger mill on there to up your power to weight ratio...ran my .30 powered one today, on snow it was fast enough to blow over at about 3/4 throttle, thats a downside to light weight, they like to take flight...I'll post about the boat later once it drys off and I can take some pictures...