I will refer here to RED RODNEY because my father wouldn't make him another piece after he made RED his "grail". Red and my father had a falling out and since my father never indicated on Red's piece what the mod was... his NEW maker couldn't "figure it out". So they would call with the size under another name and my father knew it was them and wouldn't do business for any price. Basically, my father spent a lot of time with RED for FREE, cured a lot of his problems, and when Red came back on the scene he was the "MIRACLE" player and he never mentioned my father and that's why he never could get another piece made for him from my father. I'm sure his 3x3A is different from ALL other 3x3A's.
Here is a used by RED RODNEY AL CASS 2-2(inscribed "Al Cass Milford, MA 2-2"), modified/as per written tag and inner paperwork both in AL CASS' hand, 2-28 custom mouthpiece. Includes box cut open at bottom. From RED RODNEY to AL CASS JULY 14, 1963? (postal stamp on box is faded). Small paper by Al Cass included writes"red rodney" with notes regarding piece, which matching tag on piece.