Rolling Box Truck STL Model

I’m preparing a small trade-show giveaway and need a compact box-truck model that prints cleanly on an FDM printer. The finished piece should end up about Matchbox-car size—feel free to go a little larger if it helps the wheels turn freely.

Here’s what matters most to me:
• Geometry that’s simple and sturdy. I only need the basic silhouette with minimal surface detail; the sides of the cargo box must stay smooth so I can add a vinyl sticker later.
• Functional rolling wheels designed as a print-in-place mechanism. They should spin right off the print bed without extra assembly.
• Two-color capability would be a welcome bonus—ideally a body in black and wheels in white—so if you can separate the mesh for a single-pause color swap, great. If not, a single-color file is fine.

Please deliver:
1. A watertight STL ready for FDM printing at 0.2 mm layer height.
2. A short note on recommended orientation and any slicer settings critical to achieving the print-in-place wheels.

If you’ve done similar toy-scale vehicles before, a quick render or photo of past work will help me approve the style faster. Looking forward to seeing how you keep the design lean, printable, and fun to roll!