Be aware that tip numbers of Meyers have changed over time - measure it.To the refacers; what is realistic in opening up an old Meyer NY USA in a 3M facing? Curious to hear what opinions are. And second question, would you pursue doing so?
Talk to a mouthpiece tech if you want a good answer. There's more than one way to open a mouthpiece.Starting around 2:20 Jack Finucane gives his advice. This came out today.