I did manage to “break” one of mine. After a drop, it did what yours is doing. When I looked at it
through my jeweler’s headset, I found a small,hairline crack in the metal down running up the
tank from the af end. I spot soldered it with cold epoxy while I held it tight with a clamp. It’s holding, but I put it in the drawer for backup. A number of vendors online have them on sale right now for +/- $20.