Eight and Four Valve Tool
The Fab@Home now has the hardware capability to print eight or four materials in a single print without changing syringes. Thanks to the use of servos instead of snap motors, I was able to make an eight valve tool that measures only about 13.5 cm by 10 cm. Compared to the old four valve tool, the new eight valve tool has much more build space.
For those who only want four materials, I made a similar four valve tool.
We are starting to make designs for servo based electronics for the Fab@Home which will allow the use of these tools.