A modelling question if I may, directed at those of you with layouts in Spain.   A little N gauge layout of mine needs to be rebuilt here in England, but ultimately it's destined to live in a typical Spanish block/render garage attached to the main house, about 10 miles inland from Benidorm. Now, I can imagine some extremes of temperature in this location. I'm thinking of using 18mm ply ripped into 70mm sections for the framing and possibly 12mm ply for the top. Totally ignorant of whether thi