Very nice detail Greggy. I never paint toys & simply use different colored species of wood to provide contrast colors pleasing to the eye. Also another reason that I do not paint, all of my toys are donated at Christmas for distribution to needy families with kids. With all the hoo haw about Chinese toys & toxic paint, I do not want a mommy or daddy denying their youngster the toy because of worry about the paint.
Keep up the good work.
I'll just echo the words of everyone else in that it is excellent. Many years ago i made the blizzard truck and scaled it to half size and remember the many hours it took, but your design looks much better.
Don't paint it! You could burn in a logo on the trailer to represent your firm?