So a while back I encountered an interesting and scary moment when I was removing lens from a Juliet. Before I started work it was a tight frame and good shape minus 1 of the lens having a good scratch on them. Once I tried to remove 1 of the lens it literally popped out of the frame and caused the frame to need a tuneup much sooner than I initially thought on the pair. Has anyone encountered this? Working on a tight pair that as soon as you remove the lens it becomes loose and you arn't able to get it back to where it was before the swap? Any thoughts on what could cause this?