Once a closed source "pro"sumer printer with three useless extruders, this is now a workhorse OSHW 3D printing machine.
New OSHW: Printrbot PCB bed, Ultimachine RAMBo with Marlin, E3D Titan and hotend, Raspberry Pi ZeroW. Lots of 3D printed upgrades.
Original parts: gantry, wiring, steppers, XY endstops, enclosure, belts