We have 8000 N series printer. We would like to utilize capacity of tray 4 and make it the default (huge nightly printouts) .No matter how we change configuration it starts printing from tray 3.When I changed paper kind from plain to something on all of them except tray four it defaulted to tray one. Printing preferences and saving config and making sure tray 4 is the "one" no success. I scan the workstation with HP ActiveX controls which informed the PC about the latest driver installed. I guess disabling all the trays except tray 4 would resolve the problem....Any suggestions??!!