Cut three ribs for the fin today, nothing glued yet. The top and bottom ribs are made from RS-8 and RS-1 as detailed in section C-C on drawing 10. I have not cut the RS-1 pieces yet. The bottom RS-8 must be drilled and anchor nuts installed before assembly. The rear spar also needs some reinforcement blocks for the hinges installed and drilled before assembly. As you can see there is a considerable amount of work that will need done before I start glueing together.
The middle spars are made from RS-17 and must be notched to fit into the front and rear spars.
The fin is about 52inches ( 1.3meters ) tall.