This is a pencil holder inspired by the HIMARS rocket artillery vehicle.
2 versions are included - one with 6 pen slots and another with large hole as a single pencil cup.
While there is single merged model available, it's meant to be printed in 8 parts: 3 pairs of wheels and a loading bar which require no supports, then the main hull, which requires some supports under the wheel wells, launcher and the bumper.
On the main hull, you can enforce support at 30° overhangs which should eliminate most surfaces, block supports on the doors and exhaust and print with supports for support enforcers only. The included 3mf files are setup like this.
You can also print the wheels together with filament change on the last few layers for the 2 colour look.
All parts are push fit and should tolerate inaccuracies well. No glue or tools required.
2024-05-21: License changed to CC0
All my work is free and in the public domain when possible. If you find it valuable, you can support me on Ko-fi. 
The author marked this model as their own original creation.