Ah, Pete, you have an air defence fire unit too. One of seventeen I believe.
I understand what you are saying, but, I don't think the trays were original fitment to the chassis, at least mine isn't. The GM120 should tell.
Yep, mine appears to have a different shade of green but I do believe that is due to fading. Looking at my other vehicles and trailer, it appears the army used about ten shades of green, or the paint fades.