Unfortunately one side of the awning does not tighten sufficiently.  This is because the screw does not fit sufficiently well into the grove, which seems to be short.  This is quite difficult to describe.  I’m tempted to ask for a replacement but I’m not sure how long this would take.  The actual seat is lovely but spoiled by this problem as the awning only tightens from one side.  
I should be interested in you thoughts?