Dean - On trimming the keel line straight after stripping over it, I recall measuring from the outside waste edge of the outermost strip to the center line on the form. Then I marked that distance on the outside, doing this for Most of the forms. Then I connected and extended the points and cut outside the line with a pull saw. I could then sneak up on the actual center with a block plane and a rabbet plane. It was really no problem, being harder to describe than to do it. - John