Sold one and bought another. It has the larger 30 foot rig. Have changed all trim mechanisms and rudder set up. Sailed for first time yesterday in 5/8 knots and was flying a hull and going surprisingly fast. My changes so far are very sweet so I can continue. Have a second mast that I am cutting to almost mast head and raking back like Hobie 16. Will cut sail like the rig pictured but larger for the 18 feet. One hull has had a big hit but proff repaired. I still want to find better hulls but will use this to develop what I can.
As to up wind etc. This project is simply to gain a high terminal reaching speed but I will attempt planing up wind. I don't pretend to understand the advantages for buoy racing. I am doing this only to create enjoyment for myself and discussion about planing cats. My aim is 25 knots over 500 meters. I will used no specific equipment developed after the design of the boat. That is to say, yes it will have more powerful down haul out to the shrouds for example but use gear that was available then.