Hello, This is my first post so I am sorry if anything comes across as confusing. I am planning on replacing the door a utility room in my house. Currently we use it to store bedding, cleaning supplies and whatnot. Its in my base ment and a concrete foundation. Here is a link to a scale mockup of the room and what i have come up with so far. https://dl.dropbox.com/u/27366997/room CAD.skp and a PDF for anyone who doesn't want to install sketchup. https://dl.dropbox.com/u/27366997/room CAD.pdf Here is my situation. I would like to install the door and mount it with mortise hinges to the wall stud and the frame of the door. From my sketchup you can see that the door is custom made using ripped 2x4 to make them 2x3's in order to get consistent width on both boards. Then a 3/4 inch plywood surface is mounted to the frame to give it structure. Then a 3/4 inch plywood with my home cabinet wood type veneer as the face surface. The door will be trimmed in on the outside to hide the gap. The hinge side of the door will close flush and the other side will have a 1/2 inch gap to allow the door to open a close properly. I didn't design this door with a jamb as the weight of the door may not be too much for a jamb. The door will be heavy so I sourced some 6x6 stainless steel ball bearing butt hinges. I may install 2 hinges or 4 depending on your responses. The door will be held shut using a magnetic lock which is not show on the rendering. Here is the question: Can I mortise the hinges into the frame studs and the custom door I am making and not have a problem with sagging? Is there something here I am not considering?