Will,
I assumed Jaap's set up is similar to mine.
Jaap please speak up if I'm wrong.
I came up with this for two reasons. I don't like my boat sitting on some pads tat will eventually degrade the finish on the hulls where the pads arfe and second is I wanted a system that would allow me to rig and derig including getting the boat on and off the trailer all by myself.
I will attach a couple of pics that show the loading.
Basically the beam comes down on a couple of slides that support the boat as it moves forward on the trailer.
Like Kirt mentioned on an earlier post my beach wheels go under the rear beam. The trailer takes both boats and once my Blade is rigged I just use the spinnaker pole as a handle and pic it up to move the boat around. The pics I'll attach are of my Taipan going onto the trailer.
They were taken a while back and my son (9 at the time) easily picks the back of the boat up.
Hope this helps,
Regards,
Phill