I have upgrades the fighter, bomber, transport, powerplant and trainer section of the URC. Feel free to check them out at
http://www.warbirdsresourcegroup.org/URG/index.html
I will be working on the experimental and utility/liason sections next.
I also want to create an armament section which will cover USAAF weapons and turrets, so if you have pictures, schematics, diagrams, data or whatever for turret systems and weapons and want to contribute please contact me.