I just need to get one thing correct before I continue with the dream boat thread.
Someone mentioned that you loose your warranty when adding a spi to an A-cat. I haven't seen that note on any A-cat builder site! Actually I haven't seen ANY kind of rules for what you can or can't do with your A-cat and still have a valid warranty. Please check facts before stating such a thing!
The Marstrom A-cat is ok to use with spi since they sell such a boat already (M18). There is NO extra reinforcement on the M18 compared with the standard A-cat. The only thing you should check is that you get the angles correct between the bows and the end of the spi pole.
I don't have a dream boat, I look for a dream combination! Right now I have an A-cat with spi and a Hobie 16. Small boats means small problems, and the A-cat with spi is really tough to beat around the cans.
/hakan