I have a letter that is full colour 2 sided. The data marge is a name and address on the front page only. I saved my shell as a PDF and dropped in Command Workstation. I then made a PDF with he variable data from Indesign. I only did 1 page, no blank back. Dropped the variable PDF into Command Workstation, merged them and looked at my preview. It added the data on both front and back of the static shell. Is there a way to do this in Command workstation or do I need to make my variable file with a blank back for 2 sided prints to work?