Stern cabin hinged wall panel to access header tank

In classic Black prince style, the only way to access the header tank for the central heating and a whole bunch of electrics was by unscrewing a very heavy OSB panel which would either get stuck and not come out, or slide down ripping your fingernails out, severing any electrical wires en route, and landing on you. Today I decided enough was enough! I've replaced the whole thing with a timber hinged wall panel which simply opens like a cupboard door. The disc cut out of the centre has a bung to fit in it and enbales the header tank to have antifreeze poured in it without having to open the whole wall panel. The whole system works wit minimal swearage.