After the first EMAP meeting auf Auloi players Barnaby sent me feedback to the instruments and the reeds. He told me that you would prefer reeds in Duduk style.
I tried making such reeds and here is a short abstract how I do this.
My thanks go to Barnaby Brown for corrections in my translation and to Olga Sutkowska for sending some photos of ancient reeds and some further informations about the reeds.
Here is the latest manual: