glad you like the sails. Below are photos of sail board. How to make and use. These are photos by Claudio from RCUniverse. I built the same sail board but, have found it too small for sails. Should be about 30% wider. I use 50 micron Mylar to make sails. It's taken me about 10 sets of sails to start feeling confident now in sailmaking.
Below is a link to my AU Class build log. Show sails made with larger sail board.
Tried uploading a ZIP file - no go. Only allowed max. 12 pics.