Building a Catio

I have seven cats.    Not really by choice,   by drop off,  and I am kind hearted and love cats,  so I now have seven of them.   Five girls and two boys.    In order to make their life and mine a bit easier, I decided to build them a Catio.    I started the project in May 2016,  and I am just now finishing.   I have yet to build the tunnel that will take them from the house to the Catio, but I don't expect that to take me very long.   They shall be using it by next month.  This is on a very steep hill which make the construction a bit tricky.  I was up on a ladder about 16 feet in the air to put on the roof.