Re: Tongue Weight
With the design of the trailer, you've got options. I'm in the group that emphatically states you MUST get more weight on your hitch. It's very well documented many places that having less than 10% of the total towed weight on the ball can be very dangerous in downhill braking situations. And I don't believe lowering the hitch ball height will give you anywhere near that kind of change. You can safely pull your boat forward I'd guess a foot- until the transom is in vertical line with the support bolt on the rear bunk mount. I don't think you'll need that much, but you will actually support the transom better, the further you pull it forward. So move your winch post and pull it forward until you get the desired hitch weight. If you think the bunks look ugly you could even cut off the exposed part- but you would loose some of the protection from the galvanizing, so that's probably not the best idea.
It does look like you could move your wheels- in the center pic it looks like there's a u-bolt just forward of the wheels, if so moving the axles may be fairly easy, but it also looks like you've got surge brakes, so you'll have to play around with the brake line to move the axles forward. And the trailer looks pretty long for the boat length. I'd personally rather move the boat forward, and get the boat up closer to the tow vehicle, than leave the boat way back where it is now.
