I have a new (old) Sailrite sewing machine!
I picked it up on craigslist. It is the generation 1 model, but works great! It came with lots of extras... I have already started on making spinnakers for my Hobie 16. The sail dimensions were not as bad as I thought, although it will need some work. I think I overestimated the dimensions originally, and will only have to do minor work on the leftover pieces to make them work, we'll see!
I'm going to start a new blog about it: homemadehobie16spinnaker.blogspot.com/