[Daren]

Some opinions from outside the forum:

Tatu says that the cavities are too deep in the high notes. I could address this on the next design.

Martyn, a melodeon builder who showed me how to wax reeds offers another possible solution: “It could be the higher reeds are getting too much air and choking. On melodeons I usually get round this by making a small hole through the wax (about 1mm). This reduces the air pressure on the reed.”

So maybe I’ll try this first…