When it was all done and dusted (see last post) the 'fix' only half worked. The saw cut/glue line Plan A did take some of the bend out of the dagger board but not nearly enough. So I hauled out Plan B. This plan (see photograph above) is pretty self explanatory. The insert (right) is a piece of Iroko timber which is very strong and upon which I staked my implacable non bending hopes.
I have now shortened the board considerably, rounding the forward leading edge and the bottom of the board. This has removed most of the twist and bend. The board can now be used as a very heavy weather board for the Zephyr or perhaps a main board for 'Scout' my clinker sailing dinghy.
Given time shipmates I will complete that blank and have a dagger board whose straight as a die sight line will compare on equal terms with any world champion plump line and its plumb bob you might want to choose.