I have 3 ImageWriter II printers and the manual says do not touch the SW2-5 and SW 2-6 as they are reserved for technicians for hammer strike. I haven’t touched them and all printers work fine. But I just noticed on one of the printers the SW2-5 and SW 2-6 are set oppositely from the other 2 printers. Is there even a factory setting for these or does it vary from printer to printer based on how it was tested from the factory? I don’t plan on touching them I was just curious.