My little garage building operation has just enough room for my table. I start the next phase by building the board's cradle. This method works well for me. I match the spar to the cradle.
My next step is glue the ribs to the spar. I use bricks to keep the spar and ribs in place overnight while the glue dries.
The next day I add the 1/4" x 1/4" cedar stringers to the frame. Those get glued in also.
The stringers add a lot of strength and weigh less than a 1/3 of a lb. Those get glued and dried overnight. Now I can trace the frame on the bottom panel and glue those together.
I like doing it this way because it's simple. I've never had a bad result. There is a fair bit of set-up work.
Thanks for your support.