Hi Ben,
I recently had an idea for a combination 3D Printer, CNC Machine and Laser Cutter. The machine would have an X, Y and Z axis, just like a 3D Printer, however the extruder would be removable with some form of clip. These heads would be a 3D printer extruder, a drill head for the CNC machine and a laser.
I tried to design this myself however I gave up due to a lack of money and knowledge.
Would be great to see this on the ben heck show!
Emil