I have just spent about 15mins going through how to remove the tank, box, and what pit falls to look out for only to find that it didn't upload.
Rick, watch out for rubbish dropping into the open bellmouths. Put a couple of socks in em. When removing tank, get someone to help, if no possible always keep one hand holding the tank left is best for me, while releasing the fuellines, electrical leads etc with the other.