Me too. But in this case I kept going deeper with the chamber until it got too deep. Then I drilled the draft hole a tad more just to see if they’d meet up. As the cross section shows, it was not to be.
This makes me strangely happy. I fished the other half out of the trash can and routed a hole between the airway and the chamber. As we speak the two halves are clamped together under extreme pressure with the best wood epoxy between them.
I will have to re-drill the mortise for the stem and the chamber because the kerf of the saw has made them un-round. It will also probably have to be carved as a sitter as both the chamber and the airway extend very close to the bottom. I may have to add material to the bottom of the pipe but I have seen that done (for aesthetic, not functional, purposes.)
A fluffy pipe cleaner will not pass into the chamber. That is for sure.