I'm not getting that screw back, am I? It just pinged and tinked off so many things on it's journey to the center of the instrument that the resultant noises could probably be used to cover the beginning of the song Down Under by Men at Work. I've definitely dropped essential screws into the Cobas before, and the Immucor Neo...hell I dropped a pair of pliers into the strip bay of the Iris. Just because I know how to do the maintenance doesn't mean I SHOULD. When they sundown these instruments, you're gonna find a miscellaneous part graveyard. I just hope the instruments can deal without having the screw in place.... only one way to find out....wait it out and blame another shift!