The actual problem is in the design for it to work. If one looks at the under side, you see that the clamp has a raised area on the end away from the dist. and the dist end sits on a lip of the dist. housing. This allows for a clamping action when the hold down bolt is tightened. I would guess that some over tighten the bolt, crushing the center down since there is nothing to support it. If one only snugs the bolt down enough to prevent the dist from turning, the pot metal crap would hold........maybe.......for a while.......