This thread has been derailed several times
I can't see a pic in the original posted link anymore. Is this the boat you're talking about? (Your Gallery)
I see that your trailer has a hook type latch, almost the same as mine, same principle anyway. They're designed such that you back your trailer into the water, go jump in your boat and drive it onto the trailer. When the boat hits the bowed pipe, it centers the bow and latches it in. How much easier can it get? If you have someone else with you, they drive away from the ramp with you in the boat (don't forget to raise your motor). Sometimes I drive it on, like on a real windy day, but for the most part (even with 2 people there) I usually just push the boat off from the dock and float it onto the trailer, pulling it in with the front line until it latches in. If you're doing this single-handedly and drive the boat on, you still have to climb down the front of the boat to the trailer to step into the water to get to your vehicle to pull the boat out, anyway, (taking breath) that's why I just float it on - saves the climbing part.
I see your trailer is a tandem. Is it torsion bar or spring suspension? Hmmm..
...kinda dark under there but looking under your boat in the above pic I don't see any springs but think I do see a bar going across, so it's probably torsion bar suspension.
I also don't see any bunks, looks like they put some kind of liner on the top of the I-beams. True? Again, a different approach, but they look short and don't go to the back of the boat. Might want to look at that - speaks of the same thing Wart was saying earlier.
Also, I think on yours, I would install a secondary line with hook that you hook into the front eye of the boat (is there one there?), after you've latched it in, to secure it a little better when trailering - maybe a v-type approach with heavy lines bolted to the trailer and the single hook to attach. I'd be afraid that somehow the boat would come unhooked while pulling out of the ramp and
One difference in the design of ours is the mechanism on mine is spring loaded, locks in through the eye and can't come unhooked.
If there is anything I don't like about my trailer, it is that it is very light. The light single axle torsion bar suspension with small 10" tires and the big wooden bunks actually keep the trailer floating when you back in. On windy days I have backed in and the wind has almost blown the trailer under the dock
before I can climb up on it to submerge it. That would have been a bummer. Done that several times. Just have to be quick. Yours not having wooden bunks and having dual axle weight might alleviate this problem.
I think you'll like your trailer. They're designed with ease in mind and perform well.
Hope that helps. I'm gonna go soak my fingers now, gonna be sore from all this typing.