It works!!! Thanks so much for the help!
I don't know how to uninstall a program, so I did not uninstall Printerdrake. However, I did delete the Epson NX420 from Printerdrake. I then logged into CUPS (http://localhost:631/
) per your linked post, went through all the screens to add the printer. I then went to a LibreOffice document I've been trying to print. It printed!
I'm glad you "felt my pain" and went to page two ;-)) I had pretty much given up on any help.
I've been using PCLOS for a couple of months and, overall, it has worked well. Getting this printer to work has been a big issue that is now solved.