Not to put too much of a downer on things but it is more of a pain getting it back in than taking it out. When you remove it, the vent pipe drops and doesnt allow the box to push right back.
It's really awkward to try to hold the pipe in the right place whilst getting the box in the right location. I ended up having to take out the panel at the centre of the dash (the one with the map light on it), removing the centre vent and holding the pipe in the right position at the end of it whilst sliding the box in.
Nightmare!!