That is good news

just what I suspected....here is what happens and a good reason to check connections for the first month or so, it seems after that they never come loose. If you do change a cap, or resistor check again for awhile.
Here's what happens....the edges are pretty sharp, so they make good contact with the wire, the closer you get to the bottom of the wire bore the more chance you have of getting it tight before it reaches the very bottom of the bore, so you think its tight, then it moves just a bit and its loose again. This is all because the bores are large and the leads are so small. Once it finds the true bottom of the bores arc it stays forever.