How old is your Max? My Italian Max is from the original batch and has the same little doohickey. I thought it was an odd way of keying a scale and pivot, but it being a fix makes more sense. What I'm thinking is this: one version of the original American Max didn't have a keyed scale or liner (D hole), and perhaps the Italians used this model in making theirs, then realized the issue and applied this fix before sending them out. Who knows? It would be interesting to take a brand new Italian Max apart and see if they still have this or if they're making the scale or liner with a D hole now.