Just finished installing three additional gauges, engine oil pressure, water temp and voltage. Started with a cardboard mockup of a box shaped housing and decided that I rather go a little bit curvy. Front panel is made of wood, gauges are recessed (using router), housing is made of 0,7mm aluminum. The top bracket is fastened with the existing screw dash/panel. For the lower bracket I had to drill two holes. My tape player will move an inch or so to the right. Next I need to borrow a can box, so that I can program the gauges (light color, trigger points for warning lamps, ...)