I really have to add some extra praise on how well the truck is done, but I am not without some suggestions that in my opinion would improve it further.
The first is on the front hitch. There aren't many towable/tow along vehicles that you can hook behind a tractor and drag from field to field. While you have the bar on there, it generally doesn't attach to anything without the "tow bar" mod. Would be nice to bypass it.
If the tow bar mod cannot be bypassed, perhaps some tie down straps and a solid roof? Would be nice for said bar could be attached to the roof, as well as other cargo.
Functionality, I can't find anything wrong with it. It runs and drives perfect. Amazing work as always.