I see comment here on the carrying capacity and the size of front boots. I do think there is huge scope for a design rethink here. When I was looking for a second hand unit for my pending half lap, I looked at AS and KK then stumbled across Cape York Campers. (RIP). It was the load carrying capacity that sold me. Under the bed is huge compared to the other two. It is stepped front to back in 2 sections At the rear its 500 mm deep, full width of the trailer and 300 mm at the front.
Compared to the slide out tray arrangement of the others I looked at, this won hands down. It also allows for better weight distribution I would think.
As good as the others are, and they are, I think there is room for improvement in this area.
Just an opinion.... But everyone has one, I know. 7 working days and I'm off....ye ha :-)