The fingerboard part V

The bottom of the fingerboard wasn't flat any more. At first I thought this would be because the piece of ebony had been in the holding jig for a long time and wasn't in contact with air from all sides any more. Maybe the moisture from the jig or something would have caused the bend in the fingerboard. So I allowed it to breath freely for a week no change. I have reduced material from the fingerboard very non-uniformly so maybe the change in shape has to do with relieved internal stresses in the wood. As a result I decided to reflatten the bottom. So far it has kept the new shape well.