We''ve used plan "b" above on one section of our cabin sole that needed replacing, and will be proceeding to do another this season. (After 22 years, I can see how some of the floorboards might get be gettting tired.) The one we''ve done looks fine, and, amazingly, the insets line
up exactly with the originals - we must be using the same material! Key is coating the end grain to keep moisture OUT!. Don''t forget to coat the insides of the finger holes too.