Model railroads.

Back in the 80's we built a 4 lane Watkins glenn slot car track, we surrounded all the curves with 1/2" drywall so the cars would slide around the corners flat and not fly off. I have a buddy who is 8 hours away from me, he has a serious train layout which he has been working on for the last 10 years. He is doing 1930 era stuff, his buildings are all authentic scratch built from kits. He has this weathering technique that is so cool. He has been guiding me a fair bit so i appreciate all his help as well.