I didn't know about that pressurization thing at first either... my training was all over the phone, & we had 10 hours of delays with trying to do set-up and training, finally waiting until after two visits by HP techs trying to get my brand new machine to print... but in any case... after not being around here much lately, this thread reminds my pretty damn quick of the amazing value in this community! Thanks again Fred, Jason, Gary, Tim, 2CT, Matt and the guys at Castek... great to have access to this resource!