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: "Super-Duper Chord Buddy" ... for Brendan Power Quad-Six system
BASIC CONCEPT:
In my original Chord Buddy, I fit four useful chords (a I, IV, V and vi) into the diminutive Seydel Big Six. I later expanded upon that idea using a Twin Big Six comb (i.e. two Big Sixes, side-by-side). That led to a version using Brendan Power's "Little Six" Switch-Harp system. In this iteration, we make use of four Big Sixes fitted intro Brendan's Quad-Switch system.
WHEN/HOW: December of 2017. I have not yet made one.
LAYOUT/DETAILS:
Note that each chord can also be played with inversions, and with or without a reentrant b7th note.