Good work, Rex. I love this kit, and built one a couple of years ago. Must dig out the piccies.
A few points you might like to address, though:
First, the bags on the rear deck of the Quad, and on the front of the limber, will fall off as soon as the driver engages frst gear. When he sees it, his Battery Sergeant Major will tear him a whole new a*sehole! They need to be tied down. In practice, bags and packs would be more likely to be stowed inside the Quad.
Second, when in trail mode, the front of the limber, the breech and the muzzle would be covered with canvas bags and tarps. It's easy to simulate this with tissue paper, soaked with dilute white glue, and painted with watercolours or acylics.
http://www.liberationchildren.org/lib/lib2/images/Wilp1.jpg
Third, when in travel mode, the gunsight, a delicate precision optical instrument, would be removed from the gun and stowed safely and securely in the Quad. The mount would also be covered with a canvas bag.
Cheers,
Chris.
Cute and cuddly, boys, cute and cuddly!