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!
In addition to the standard half valve job, I put valves on the low end of the Lucky13, both blow and draw. With a bit of adjusting and practice, I can now blow bend and draw bend the notes on the first 3 holes. Very, very cool. I just love these harps!!!
