Resurrecting this thread: I have a bunch of WMS games and a pile of legs to match up. I was going by the above guide, and there's some confusion between half rib and full rib from Pinball Resource, Flipper.be and Pinball Life. I think I can muddle through that, but when I start to look at IPDB for most of the WMS System 6 to 11 stuff, I see a ton of black legs, even in some of the flyers. Are all these IPDB pictures wrong, or were black legs sometimes an option. Because I seem to have more black legs than machines. IPDB shows black on games like Pharaoh, Gorgar, EATPM, Rollergames, Firepower, etc.