I am building a desk system using Kitchen Base Cabinets and Kitchen Countertops. I am going to use 18" wide cabinets and I am wondering if it would be safe to put the Mac Pro inside of the cabinet. I will have one hole on the top of the left side of the cabinet and I will take the wooden insert out of the door frame on the front and replace it with speaker grill mesh. The mesh will essentially be like having the entire front door open. Would I need to take the back off of the cabinet or do you think the machine will have plenty of air. I belive there will be about 3-4 inches on each side. I tried searching and found another thread on the same issue but it didn't say if it would be okay to have it enclosed with the door open.