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!
NAME: "Richter's Backpack" ... for the B. Power Twin Harmonica System
BASIC CONCEPT:
Many players are devoted to the iconic Richter diatonic tuning for 10-hole harps. This "Backpack" allows them to retain every iota of the Richter system and incorporate additional musical capabilities.
WHEN/HOW: December of 2017. I have not had one made.
LAYOUT/DETAILS:
Slide-Out would be Standard Richter. Slide-In would switch to the "Backpack".
Notes of the Blues Scale in G: G — A#/Bb — C — C#/Db — D — F — G