Just seen this as I haven't been able to get on RU for a while! Its fab, you've done a great job. I've saved this in my Favourites ("Nursecroft's Shed Thread" :lol
so I can refer to it when we put our shed up. The drainage is a great idea, I hope my OH can get a bit of a discount a Travis Perkins as he uses them for work.
Hope your gorgeous buns are enjoying life in the palace!