Rolling Ruler / Truck Pencil Case - #backtoschool

Created for the #backtoschool challenge is a truck pencil case. The wheels attach to the truck using pencils as the axles. The wheels themselves are the ruler / pencil topper. The wheels are marked with numbers for each mark on the tire representing 1 cm of distance. To measure an object you can roll the truck starting at the 0 mark and noting the end position.

Working on the print now. UPDATE: New STL files loaded after setting up design for print. Noticed a few faces were wrong. Al