This configuration is just of my own design the "stacked" Raspberry Pi Processor will also act as a small server. I'm probably gonna increase the processing speed over time, one usually is enough, but to get more productivity it might prove useful (especially working with 3D Printing and Gaming on the device...). I don't know if I can turn the 3D Printer into a D.I.Y. custom build it would save time just getting a basic model online. As an alternative use a larger screen with USB capability and all the extra built-in components.