Saw Diamond Cat and got excited.
I always wanted to get a couple of Diamond's like in the pic and cut off the keel
(ply with a lead bulb)put in some dagger boards
and build some curved Ply box beams to join it up, leave the rig's in and have a go at a poor man's Team Phillips (but with better results for a much lesser cost)
I bought this boat for $3000AUD, flogged the crap out of it for 3 years, and sold her for same.
This included a hard stand trolley.
Best bang for buck I ever had, and blisteringly quick (mid teens)
Good luck with it Rory, post some pic's and welcome aboard.