Oh bugger; that vehicle passed way under my radar, and seeing yours, I now very badly need one...
Great work on the yellow and you're right; the spraypaint and shade work very well together. Too bad I'm already comitted to another shade of yellow (and another recipy) for my Imperial Fists, or I'd start using yours instead!
The idea of leaving the guns removable certainly is a good one; I like my terrain to be as versatile as possible too