I decided to make guide cuts with the table saw so that I would have some guidance when rasping and planing the profile.
Marking up the profile, the numbers are the depth of the cut at each line
As I do not have a good wise to clamp the centerboard to during shaping I had to build a temporary table on the strongbox.
My "clamping table"
Centerboard ready for shaping
Starting to shape the leading edge with spokeshave, plane, rasp and sure form
And the other side, plenty more to do tomorrow
Time today: 4.5h