If it makes no difference, I'm not touching it. For whatever reason, this has been the one task that has given me the most angst. Maybe I was beaten with a malformed centerboard as a child (I was beaten with some interesting things...) I'm going with "if it ain't broke, don't fix it."
I see that now. Maybe a side note would clarify. The instructions do leave some things implied like the total length of the blank before cutting, or the parallel nature of the top and bottom edges. If you decide to make an update, I vote for separating and/or removing the plywood centerboard instructions and inclusion of the above items. Or incorporate these tweaks in the 12er's plan :DQuote:
... but I think the instructions must be cloudy ... as the back edge is intended to be a curve.