Reply To: A P37D with high quality reeds
Fascinating experiment, Daren! It seems that it might be easier to get satisfactory results with a smaller number of reeds, for example with a P-25F. Then there’s also the possibility that what doesn’t quite work with a Yamaha would work with a Suzuki, or with a Hohner. A 1970-82 Suzuki Study 25 (A-25) might be a good platform. They are well constructed and plentiful.
The result of your 3D printing looks excellent.