It would be better if the center roller on the back was longer. Pushing the boat up is no problem because I can see where the hull is on the roller but taking it down I lose sight if where it is on the roller.
This is how I figured out how to transport my Aero. Thule adjustable racks and 2×8 ×8 Lumber and 2 trailer cradles. My original plan was to put the boat on top with the dolly but the dynamic dolly we use in the US is not meant for this because I tried. So I opted just to put the boat up top and it has worked out beautifully. I needed to do it this way because I plan on bringing this boat with me when I travel across the US pulling a 27 foot travel trailer or what you would call a caravan in Britain.