Printed in 6 colours of ABS, with black TPE for the tires.
The logo on the shoulder came from here: https://www.thingiverse.com/thing:1131435
Some alterations were made to the original model:
- All lights were carved from the original model with blender, printed with clear ABS, then tinted with permanent marker.
- Many parts were seperated to be printed seperately in different colours, such as the vents on the helmet.
- Folding driver and passenger seats were added in the forearms.
- The Matrix holder was altered slightly, and a Matrix was modeled to fit in it. The interior blue section glows in the dark!
- Details were added on the thighs (front and back).
- A spring-loaded button was added to the knee parts to lock the thigh in place in robot mode.
- Fuel tanks were completely redesigned, and I'm in the process of adding some tabs to lock the shins in place in truck mode.
- Some panels to cover the wheel wells were added on the shins.
I believe the original toy had the last few features, at least from what i can tell from reference photos.
Brass rods were used in place of the suggested 3mm filament and toothpicks for the hinge pins, and flat-head nails were used to attach the wheels. The holes in the fingers were shrunk slightly and 1.75mm filament was used for the axle there, as the hands seemed too fragile to friction fit metal. Some lego window panes were sacrificed to create the windscreens - the cabin had to be modified very slightly to accommodate this.
Printing this model was a massive undertaking, and helped me precisely calibrate and hone my printer, and learn how best to configure my slicing software for consistent results. Unfortunately I haven't figured out how to do the same for my camera's colour balance.