As I’ve said, my empennage kit is 15 years old. So, I don’t have the benefit of match-hole technology that the newer kits have. The skin on the vertical stab is pre-punched. But, the ribs and forward spar are not. So, the skin has to be drilled onto the spars and ribs. I chose to follow the method demonstrated by George Orndorff in his video series on building RV 6/7/8 kits.
This is how it looks as of this morning.
Here, the vertical stab is in the jig. And, I’m getting the skeleton lined up by using the dimensions called out in the drawings and by using my Mk-I, Mod-0 eyeballs to spot the sharpie lines I drew on the ribs and forward spar.
While trying to puzzle out exactly the best way to flute a rib that was slightly bowed, I stumbled upon the discovery that, in good light, the fluting locations are reflected onto the flanges of the part if I match it up with the full-size drawing. For the actual fluting, I followed the method shown in the EAA “hints for homebuilders” video at http://www.eaavideo.org/video.aspx?v=1786897202001 .