Wall 3x4'' /w Door

A 3 by 4 inch wall with a door. The door frame has enough holes to accommodate door hinges in 4 position - the door can be rigged to open to the front, back, left and right. Thus, the door itself has to be symmetrical. This is a design compromise to favor interchangeability. The downside is that the unused 3 sets remain open. Looking at the pics, they kind of appear like small alcoves where to put a candle, so IMO the design shortcut doesn´t hurt that much. The door fits into the frame when closed and can rotate from 0 to slightly over 90 deg. The opening is about 20mm wide and 40mm high, i.e. slightly bigger than a standard indoor door when adjusted for scale. Normal people have plenty of room, Astartes will have to angle their pauldrons. On the upside, a single Astartes can hold this door pretty much forever.