I stopped working on the setup a long time ago. Works just about perfect for my needs so I don't even think about modding it any further.
It looks just like the last 2 pictures and is holding up great. Still on the original steel wheels which do show some rust but as yet, I haven't had to add any air to them. A winch on the cart might be nice but honestly I don't think is worth the extra weight. Never had a problem getting the ski up on the cart, if I'm by my self I just go into knee deep water and the ski floats right onto the cart.
The rollers on the trailer work like a charm, one person can load up the ski and cart with just a light push on the back of the ski. Height is just about right to work on the ski and after I wash it I just pull it back off the trailer without the cart wheels and all the bilge water runs out.
Yep, I'm happy with the deal.