Thanks for the reminder Michael! I move the car between Los Angeles and Phoenix summer and winter and am headed back to LA this Friday. I just checked and they were finger tight. Snugged them with the pliers.
I don't know of a good ultimate solution, maybe mix up a bit of JB Weld and dab a tiny dot of it (using a toothpick) on the screw on end. That should lock the two bits together. Let it dry before putting the lead back on....
