I corrected the helmet basic measurements image (the dome side view from 237mm to 247mm) and the rangefinde measurements image (by mistake I inverted the names for the ROTJ and ESB perspex blocks) but it seems that now is a 24 images/post restriction, so I will add the corrected files here:
Just moved the corrected rangefinder measurements image (because of the 24 attachments/post restriction) to post #32 as I inverted accidentally the names for the ESB and the ROTJ perspex blocks.
I had some advertising panels used in the food commerce (markets, hyper/supermarkets and so on), but others used for sale signs or simply you can buy it in craft stores.