John Deere 9 Series Tracked Tractor with Planetary Steering

[ddmckee54]

Something is not making sense to me on the planter drawings, and that's the length of the triangle braces for the wings. It would seem to me that as the wings fold in, either those braces need to get shorter, or that center support frame needs to get longer, which is it? Or do you have something else to astound us with? (Nice drawings by the way. I've probably asked this before, but what CAD package do you use?)

Don