I think I finally see Rob, your 4 in frame 42 is over what I believe is called a futtock or main tall rib and the 2 in 42 is over the floor rib. One is offset by
about the amount I am off. The only caveat I faced was on the
jig where rib 42 is called to be on the taller futtock. The other situation called for a vertical post up against the mast step, see yellow post. The post location is dictated by the notch in the keelson. I believe you have solved my mystery, thank you!
I spent quite a bit of time today setting and dry fitting the main mast. The deck beams are in their plan location, with a little fenagling I have found a home for the main mast check it out.
The yellow post and mast step butted up next to each other first.
View attachment 547312
My final solution dry fitted only.
View attachment 547313View attachment 547314
Now on to more adventures in modeling.
Again, does anyone know what's up with having to post then go back and rotate these pictures?