Malcolm-Hello. I ordered an 8' MiniMal kit from Wooden Surfboard Supply and just opened it. The rails are square. I thought that they would be the same as your RA board (similar to a Grain board). What other boards (from Wooden Surfboard Supply) are the same building process as how you did it on grainsurf form? I've just finished my 20th kayak/canoe and my 1st surfboard. I might be able to make it to Santa Cruz for the SC show. It's a long drive from Bend, OR, but worth it. If I do, I'll bring a couple of kayaks. The Elkhorn Slough is an amazog place to paddle.