I thought about the rusting reeds, but aren’t accordion reeds stainless? Carbon steel reeds would rust in a humid environment anyway. As for moldy wood, the Pro 36 is wood and doesn’t seem to have that problem. It would need to be able to air out periodically though. I would think the large air pressure might be mitigated by making the air chamber smaller, but if the reeds are a lot stiffer, that obviously wouldn’t work.