Were Your Tone Holes Chamfered? What Is it? Why do You Do It?
These photos show tone holes on a Conn 12M. In the left column the tone holes a have not been chamfered, while on the right they have been.
This horn was overhauled several years ago, but lots of necessary mechanical work was neglected, so it is now in my saxophone repair shop in Seattle. The tone holes were filed during the previous overhaul. Some of them are even level, but none of them were chamfered. Any facing of a tone hole will leave an edge; a burr. The burr must be removed. The burrs can actually tear a pad, although it is rare, but they often grab the pad interfering with its stroke, and if you think you have seen really stick pads, just think how bad it is when there are sharp edges on either side of the tone hole rim. It's terrible.

Tell tale signs of proper chamfering will be on the outside rim of the tone hole, as seen in the top row here.
It does fade, so, if your horn was overhauled some time ago, the mark may be gone.

                                                               Up Coming Overhauls
A 1941 Conn 30M Connquerer. A 1917 Buescher Tru Tone Soprano keyed only to high Eb made before Buescher designed the Snaps. And a 1949 Buescher Big B Aristocrat Tenor.

                                     Structural Breaks Should Always Be Silver Soldered.
Call me picky, but I resoldered this D palm key touch piece because it had been soft soldered. Silver solder is far stronger than soft solder because the alloys are heated to above 800 degrees, and at this liquidus temperature, the molten filler metal interacts with a thin layer of the base metal, cooling to form an exceptionally strong, sealed joint due to grain structure interaction. The silver brazed joint becomes a sandwich of different layers, each metallurgically linked to each other.
And it looks way better when it is done cleanly.
This is part of a Full Mechanical Overhaul on a '73 Mark VI. I could have left this key the way it was. It did function after all. But that is why I say, "call me picky."