Where I work, a tech runs the cleaning of scopes, sterilizing, etc and also hangs the scopes. Otherwise, we (RNs) get the snares, forceps, argon, dilators, or whatever, and we do the opening and closing. We're an outpatient center so we don't do anything but EGDs and colonoscopies. Everything we need is in easy reach. It works fine for us so that's why I was confused and didn't see why a tech would be needed. In a hospital setting, I can see why it might be more important to have a tech in the room.