Anything apart from the two mainstream default harmonicas (Solo-tuned fully-valved chromatic, and un-valved Richter 10-hole diatonic). Alternate tunings, different construction, new functionality, interesting old designs, wishful-thinking... whatever!
BASIC CONCEPT:
This tuning is designed especially for folks who play harp in a neck rack. There are three FAT chordal zones, one each for the I, IV and V chords--and also their b7ths! As far as chord-chugging goes, this tuning should be very forgiving of imprecise playing technique. The red brackets show where one draw note of the minor hexatonic blues scale can be bent down to the next lower blues scale note.
WHEN/HOW: January of 2018. I have not yet had one made.