I've recently purchased some Ludwig 3 ply shells with a goal to make a player's kit. The drums are early 70s models from different sellers.
One thing I've noticed is that some of the bearing edges are round, while portions of the bearing edge on the same drum are flat, as if the shell was not completely level originally and the bearing edge router didn't make contact with the shell in places leaving flat spots.
What do drum restorers do in this case- have them re-cut or leave them be? Is this typical of Ludwig 3 ply drums? It appears they came from the factory this way. My 6 ply Ludwigs have perfect factory bearing edges.
Hopefully someone can understand what I'm talking about. I did a quick search and didn't find anything relative to this.