have a look at this
Rick Toone Production Guitar
has so many elements of what I want. aluminum neck. fanned fret. ergonomic shape. headless. can be a six, seven or eight string. bottle opener.
but look at the neck profile!
moreover it has an interesting variant on the Z glide design that Dean Zelinksy uses.
grooves that minimize the amount of tactile surface of the thumb.
make the fretboard dead flat and I am there!
for the full story on the production guitar