Okay, to answer your questions:

I now have a picture of the catamaran in my computer, but still have to find out how to display it here.

The main goal behind my redesign and building effort was strength and weight. So I replaced all the old and fatique parts of my 25 year old P15. New hulls,new beams which by the way are connected in a fixed laminated way, new self-built rudders, new self-built rudder-castings, etc. The only thing which I re-used from my old P15 is the sail and the mast and the shrouds and the ropes.
Further on I like to stress that my sailing on the north sea has more to do with control in heavy circumstances. Rather than focus on speed; strangely enough I often go to fast. I use rope behind me to slow down!

As a windsurfer who surfs in stormy weather at sea I'm used to very high speeds returning to the beach nearly escaping the high waves behind me. So hence my choice for the P15 design which has a lot of rocker and scoop in his bottomline.
To show something of this, please see the photo of my home beach with:
www.flickr.com/photos/ingeliefhebber/2115133842/in/set-72157606389549773/ made by janwillem wolf.
It's not for showing off (I'm the surfer on the photo) but to give you an idea of what is all behind this redesign.

To make the hulls identical, which they are not, because assymmetric, they are mirror-like; was not easy. The hule I shape out of a large square block of foam (PS-25) starting with squareoutlines cut with electric hotwire via wooden cuttingtemplates. then the handwork starts.
To be honest, while sailing I detect a difference in behaviour from the left and the right hull. So, they are not precisly identical, I think. This effect is enlarged by the effect that the hulls (of all Prindles) are bend out to the outside along the length-ax, as are the rudders.