Mission Accessories eXtreme!
This toy truck has a steerable front axle and a rail system on the back to slide on multiple accessories for different missions. The front bumper includes slots for front mounted accessories. Windows can also be printed in a variety of colors, and simply pressed into the slots in the main truck body, to be held in by friction (fit may vary by printer / print orientation).
The base vehicle posted here includes a fifth wheel for a trailer that's being designed.
I do plan to post the dimensions for the rail mount system so other can develop their own accessories.
Existing mission accessories:
Dump Truck: https://www.thingiverse.com/thing:3236977
Fire Truck: https://www.thingiverse.com/thing:3224823
Snow Plow: https://www.thingiverse.com/thing:3253066
Liquid / Gas Tanker: pakmule87 saved me some work on this one! Great job! https://www.thingiverse.com/thing:3307335
The only extra material required for assembly is assorted M3 screws. Use M3 x 20 screws on the steering axles to ensure sufficient strength. Be aware that there is a slight recess in the steering axle to accommodate the head of the screw. Use M3 X 8 screws to hold on the aft bottom plate. Use M3 x 6 screws to secure the forward bottom plate. Use an M3 x 12 screw for the center hole in the steering tie bar and top steering tie bar.
This design was inspired by and dedicated to my newborn son.
-Side and Aft Windows are best printed vertically with support for tab, with support.
-Windshields are best printed with outer surface up, and tab down, with support.
-Steering shaft is best printed vertically, with the knob up, with support.
-Axles are best printed vertically, wheel hub down. Ensure your nozzle is close enough to the bed to get a nice solid hub surface.