Well today was the first opportunity in a long time that I've had anyone around to help me lift the dome off the POD for a bit of maintenance and to fit a solar fan.
We lifted the dome off and I was going to give it any extra coat of black Fusion paint on the inside to try to keep more IR out during the day, but unfortunately the masking tape I was using decides to peel off in sunshine.
So I flagged away that idea.
I had some Dow Corning 791 to re-caulk the dome, so that was next. I haven't had any problems with leaks from the old caulk (roof and gutter silastic) but it was badly cracked and was very much a compromise when I built the dome. I cleaned up the surface of the dome with a scotch-brite pad to try to get some active molecular ends on the HDPE for the new caulk to bond to.
The old sealant peeled out very easily BTW... it was just sitting there basically.
I also fitted the solar fan I bought a couple of months ago. I cut the 150mm diameter hole in the outside dome shell first with a jig saw, then drilled 54 1/2" holes in the inner dome to provide equivalent open area to the fan grill for ventilation. A full width bed of Dow Corning 791 beneath the fan gasket and held in place with 3 screws.
Al.