Photo Three - Emperor Ming and one of his robot sentries examine the progress so far. (40mm Ming from Monolith, by Jim Bowen and a modified Robot Legionnaire from Hydra Miniatures).
Photo Four - The plan (actually produced well over a year ago and safely stored in one of my many sketch books until needed). The 3mm thick plastic card at the side is boxed-off with 80mm x 80mm squares.
Photo Five and Six - The Charity Toy (or Weather Disruptor Generator) position for effect and initial planning.
Photo Seven - The IKEA shelf, mounted on to some softwood battening and the edges filled with Polyfilla before being sanded smooth.
Photo Eight and Nine - Progress so far. Sorry for the quality of the photos - but it was snowing outside!
I have modelled the plastic card to look like the concrete floor of an underground laboratory, the expansion joints are carved into the plastic card with a scalpel and the concrete texture is 'pressed' into the card with an rough stone from the garden. The grating is plastic netting used in the wonderful hobby of cross-stitch.