Clear as mud, but thanks for your answer on A09.
Time for me to dig out some of my Holden literature and see if I can prove or disprove any of this!

One thing I'm pretty sure on is that "if" Holden were to release the side glass as an option it will not vary between plants (unless it was totally outsourced).

What other of the "heaps" of options do you know of that weren't mentioned in sales brochures and Holden literature?