Sometimes you use a granite base rod, then sometimes you use a long gray base rod.
Technically, they're interchangeable. When I can, I replace, Granites with with the gray rods. And besides, it's not like I have Green rods as a base and switch to a granite or anything, so what's the harm?
And for the most part, the Supports are recycled from an undisclosed project, so they don't fit perfectly but there's no harm because the ride is as solid as a rock.
I have nothing to give you here so I leave you with a picture of a chicken.