Mouthpiece refacing
Most mouthpieces that come to me are not broken, they are just not true any more. The table has gone slightly convex, one rail is thinner than the other, and the reed is sealing on three sides out of four. You feel that as a piece that is hard to start quietly and dies at the top.
What I do about it is flatten the table, recut the facing curve to a length that suits how you play, and match both rails to that curve so the reed seals evenly all the way down. If you want the tip opened or closed while it is on the bench, that happens at the same time.
Turnaround is usually a week or two once it lands, depending on what else is in front of it. I will tell you before you post it.