Hi Sam, I can’t actually remember the outcome, I must start keeping notes!
I can say it didn’t work out though. I think there may have been an improvement with the stepped design, but I decided at that point not to pursue the experiment any further.
The reeds are from:
HARMONIKAS s.r.o.
Poděbradova 2506
440 01 Louny+420 415 627 588
harmonikas@harmonikas.cz
https://www.harmonikas.cz/en/reeds-for-mouth-key-harmonicas#obsah