I found this beautilful old style KHSD D-30 demountable trimaran on the web somewhere.  I have no idea whose boat it is. I see it has the old style spade rudder that could kick-up even while turned.

I got a picture of this plywood 37′ trimaran the other day. Database told me the plans went out in 1990 to Bora Bora.
It looks great.