Still working down here in Colombia, though contracts slower to become profitable than I'd like, so haven't yet jumped on my clever ideas to take advantage of low-low labor costs down here to get some cool stuff done.
One idea I have is to find a local accordion technician, and get him to make me a basic hybrid concertina. For ease of an accordionist building it, simplicity of design, and also because I like it, my current vision is to have him build me a Wheatstone Duett, but hybrid and in Hayden layout:
It's smaller than the usual (though will have to scale-up size to fit hybrid reeds), minimal angles and curves, looks to be a pretty simple action to adapt to using stock accordion levers/springs, etc. Plus I've always loved the look of the little things, and I'm fine having a more limited instrument if it means I can have less-expensive and durable small instrument for travel.
Does this sound like a broadly-reasonable idea? My impression is that most accordion techs in Colombia work on Hohners, don't know how common building from scratch is. But if I can find a guy who's repaired/fabricated actions and boards, knows reed settup of course, and has decent woodworking skills, might this be feasible? I don't know if such a tech makes his own bellows, but if somehow he doesn't, perhaps I can get the smallest rectangular off-the-shelf bellows we can source and build around those dimensions.
Any of you concertina builders/repairers/enthusiasts have any input on the feasibility of this? If doable, what would I have to explain to an accordion tech about (hybrid) concertinas that might not otherwise be intuitive to him?