My model above is just 40mm long and could be laser cut from 1mm plastic, then layered up. The thickness needs re-working as the scaling the legth and width changed that.
My "prototype chip" model was originally a single piece, then cut into layers, but as mentioned became too big to be practical. Each cube was to be 100mm and the pipe between each cube was about 35mm dia.
What I wanted to do was make the two outer parts (one buck) and two inner parts (2nd buck), then glue the halves together. So each of the pipes joining the cubes would be a part of the main Vac pull. If heat (my heater gets smoking hot) and suction (I now have a vacuum pump and chamber) was sufficient, the plastic should form well, though wall thickness would be reduced greatly on the sides.
The reason I didn't continue with the project was size where I needed to keep the unit under 550mm long. This would mean reducing the size of each cube to somewhere between 50mm and 75mm. I looked at breaking the model in to smaller parts, but I lost interest.
