In Progress: Just a small update for today. I was informed that the Bustle Rack Extension that I using was appropriate for a US Army Abrams but incorrect for a USMC Abrams ( which I am building).
A few options to correct this problem included sourcing the appropriate parts from other Abrams kits or to use the Eduard p.e set ( which seems to be out of production). Well not having those other Abrams kits or having the Eduard set available, I scratch built a BRE form scrap plastic and brass tubing.
While not a 100% accurate, it works and once loaded with equipment & stores it should be just fine.
More updates to follow.