The next job which I though would be fairly easy was to fit the internal water tank. I'd seen @Fish mod with the level sender so that was first. Then measure, measure, measure and drill the holes for the pipes!!
Batten glued to support it.
First attempt at the piping. Feed and fill from the top and feed and drain from the bottom
I found the pipe kept slipping off when the jubilees were clamped as the outlets kept crushing. These inserts from screwfix worked well
New fitting.