Just received a great picture from a customer with some good feedback regarding his gazebo:

Hi Greg,
As promised a photo of the finished Gazebo. Initial erection was easy
with the help of two others. Did a belt and braces job on the roof
with a layer of felt before fixing the tiles. All done, including the decking by two of us in our late 60's so all in all not too bad. Very pleased with the the end result.