I remember snugging one up one time, but I can't remember for the life of me on which instrument. May even have been the Series guitar I had briefly. I remember that I actually heard something loose, and kept tapping around until finally discovering one of the 5-pin mounting screws had worked loose. I think it was the guitar, 78-1116. Coincidentally, has a 'birthday' today.
Oddly enough, I received a fretless Distillate one time, that both of the neck pickup mounting screws, (the ones that locks it in place) had spontaneously backed out and were loose in the case. Fortunately both screws wound up in the crease where the lid was hinged, and didn't gouge up an otherwise perfect bass.