The loading can be very easy with that setup. Phill himself and Geert use s similar setup.

Pretty much you have two beams which acts as rails and you have two cars that move along the beams (rails)

Some make sliding cars others just used a U-profile with bolts and small wheels. It alls dependent on how nice you want the system to glide/roll.

The cars are at the back of the boat when loading the boat to the trailer. The cat track is underneath the sterns. You grap a bow and walk up to the trailer laying the mainbeam onto the cars. Sometimes you can the tweak a little so that the dolphin striker is clear. Then you walk to the back of the boat, untie the cat tracks, and you lift the boat by the rearbeam. This is very light as the beam is already supported partly by the mainbeam. You lift the platform so it is horizontal and walk the boat onto the trailer while the care slide or roll forward. Then you gently put the rearbeam onto the beams that also acted as rails. Before driving and tying the boat down your lay same formed foam blocks underneath the rearbeam so you don't damage it.

That is it.

Wouter