This is an effort to keep the parameters separated from the model script, to reduce duplicates and magic numbers. Parametric coherence is just a welcome side-effect, as the lose dimensional accuracy of the COTS makes it more difficult to design that way.
The main file in exploring the potential uses of the 6" garden stable. There are hinges and conveyor segments, plane stabilizers, each accepting the fact that the wires are not straight, the dimensions vary by several millimeters, and all other limitations.