I had questions when my door when it arrived there was a couple of the panels I was concerned about.  I contacted Lubann and he was very helpful.  He explained what I need to do, and I had no problems with the door.  He responded right away to my concerns and sent me pictures and a diagram of the door and how to cover the holes I did not want.  Door is together and looks great.  If you have questions, call the number or send an email to the information listed on the instructions.  Very please I feel Lubann went beyond and above my expectations.