The main thing to note is that you probably aren't missing panels. For some reason, the partition uses split panels. Presumably in case you want the partition to be 3/4 height or something? It's never really explained. Otherwise, the whole shebang seems as sturdy as that run itself and is quite easy to assemble (especially if you have built a run previously). The door hinges are on the partition are half barrel ones, so the door just sits on top of them, rather than being properly connected as with the main door. Again, not sure of the reason for this, but they seem secure.