Top idea Mr [or Ms] #.

That offers a viable solution.
The curved profile neck is a much more ergonomic fingering surface than the flatter fingerboard.
Once the carefully drawn and spaced pen lines are applied - no more embarrassing audible fluffed notes or fret scrapes at folk music sessions.

Plus we could then incorporate another idea I had in mind to entirely fill the guitar with Builders expanding foam,
then seal off the hole with duct tape or a more permanent nailed on sheet of metal cut from the case of a disused VHS video recorder.

This would prevent drafts entering, circulating, then leaving the guitar,
and provide valuable insulation in winter saving an estimated 0.12 pence in wasted heating costs.