I have a Trek 7200 (Alpha aluminum frame) and it has two water bottle holder mountings, the top braze-on on the seat tube seems to have broken from over-tightening and has sunk into the frame. These braze-ons are recessed into the body of the frame tubes, as if they were somehow attached from the inside.
Is it possible to repair this braze-on? Is it something some super-glue could help with, or am I looking at a permanent wound?