I just got my two Meerschaums back from Dave Wolff at Walker. They are older PayKoc Meers and I had him to the airway improvement on them. All I can say is Wow! Dave is a great guy and does excellent work. I never knew what was missing until he did the work and the pipes are even more of a pleasure to smoke now. I can totally reccommend the work and if you have a pipe that you feel is too restrictive draft-wise don't hesitate to give it a go.