Thought I would send you a photo of the cat enclosure now it is up!
As you can see, we had varying heights both from the door then onto the grass plus the patio floods in the winter so we wanted it to be raised anyway so the sleepers were used.
We are delighted with it - the girls are out in it happily now and they are safe which is the most important thing.
We may add to it in the future but for now we are very happy with it.
Thank you for your patience but as you can see - the levels and size needed to be right!!!!