I had an idea today and wondered if there was any merit to it. I plan on making a fretless bass with lines filled with a wood or a wood/adhesive mixture. Assuming the board was glued to the neck and the lines were cut, what if I clamped the neck down at both ends with a piece of wood in the center of the neck, thus bowing the neck slightly. Then I would fill in the slots.
Will this add any rigidity to the neck when strung up? Has it ever been tried before?