u/Ill-Crab-4307

Hi, I have a few Hohner recorders and one sounds good, the others don’t. They’re identical. The only difference I can see is maybe the airway is a little larger on the one that I prefer the sound.

So I wanna make it bigger

Copilot tells me I could use little diamond tools from Amazon. Is that a good approach or does anybody have a better idea/experience with that?