RE: laser cut ribs, what would you do?
I have a friend that just built a Cessna 170 from some old plans he bought through AMA. He cut the ribs himself and when I saw them I figured he had really screwed up, they looked just like yours. Some flat bottom, so concave, some convex and virtually none of the spar notches lined up. While we were trying to piece it all together I took a look at the plans and turns out he had cut them exactly as shown on the plans, unfortunately the plans sucked. In the end, he's the kind of builder that doesn't really care and basically made the pieces go together whether they fit or not. If it was me I would have thrown them out, but once it's done I'm sure it will fly just fine.