My wood hull Bis was based on the plans from another members build which turned out very nice. However when I went to sheet it, I realized that there were numerous ribs that are not correctly shaped above the armor belt/stringer. I attempted to correct them but the shape was too far off making the ribs very thin in that area (which is why they broke there). I was going to just deal with it. After the Bis took a nasty fall and broke a few ribs, the keel, and subdeck, I have been weighing cutting the bad ribs and correcting them during the 'repair dry dock' (she has been repaired and on the water but there is water seepage from somewhere in the stern that needs addressed). Now that my CNC router will be back from the dead after 8 years I have the ability to cut new sections accurately and quickly. I have a few options for this repair but would like the opinions of vets. I could cut the ribs just at the top of the stringer and replace them with just the armor belt corrected sections.. I could cut them at the waterline which would correct the shape of the rib, or I could cut them at the 1" below waterline mark and replace nearly the entire rib. My question is: Is it worth trying to save the ship or just start a fresh build with correct rib shapes? If it is, how would you splice the old rib with the new rib? -- I was thinking of a few ways to do this. I could create a jig to cut a pattern (like a VVV or keyway) into the remaining rib section to maximize the surface area for the epoxy to grab, or try to splice the ply layers together like a finger joint (way beyond my tooling ability but I know people who do wood working and might have a way to do that), making the stringer the full thickness of the rib to support the jointed area, or adding a splint. These are the 6 ribs that need to be replaced with a corrected shape. The line from the stringer up should be vertical not flared outwards. The 4th rib back is also terribly incorrect but Im not sure how to correct the entire rib at this point.