Thanks a lot you guys!
Dave, Stone Mill still shows up on eBay under the username treefactory. He just had this listed again this week and last I looked he had the Chama oil house kit too. I check his items once in a while as he sort of randomly puts things up. I'd like to get his stone mill kit eventually.
I am using Rustoleum Camo Khaki spray paint for the cement color. I swear this used to be sold under Krylon, right? I wash it over with black and brown acrylics, then use a bit of white for drybrushing.
Mike, I have a few motor castings already but I may get those Crowe ones too. Those are nice - thanks for the link! Maybe this shop could also rebuild pumps, gearboxes, and balance some flywheels so I can have an excuse to get more detail parts eventually.
I also got a chance to make some brass gutters again. I painted them up with a copper wash. Here's a progress shot: