Good morning. I was curious if there is any reason why I should not delete all of the ctb files created when you install AutoCad (ie. monochrome, 25% screening.....)? Our company has a lot of ctb files created by employees and we would like to delete everything except for our standard file. We do nothing with our plotter except black and white prints. We never do and renderings or colored drawings on the plotter. I would just like to make sure that nothing catastrophic will happen if I delete a ctb file that needs to remain. We are using Desktop 2004 and our plotter is a HP Designjet 500. Thank you in advance for the help.