I'm having a moment when I'm glad to have a stockpile.
I knocked my trusty GMZ ProVari off a counter onto the floor and the topper broke off, leaving a 1/8 inch piece of the 510 connector jammed deep in the top of the mod. I tried all the typical things that have worked in the past - first a pencil eraser, then a bolt that just fit, freezing and all. No luck.
I'll eventually likely get it out with a bit of Dremel work, but having another in the wings sure did help in a time of crisis. Having more than one of most anything I really like is a wonderful thing.