I've been designing this printer for over six months now and slowly accumulating parts.
I've got around 2,000$ in parts so this project will be underway as soon as I am confident the CAD is complete and send the sheet metal out for fabrication.
Its most unique aspect is the provision for three direct drive extruders, two of which are on independent z actuators. To compensate for the increased weight, the design is enormously more rigid than a typical 3d printer. I would characterize it as a belt driven router.
The frame is 6040 extrusion with linear rail. It uses an H-Bot belt path actuated by 220oz/in closed loop stepper motors. The z-axis motion is provided by a C3 ballscrew. It has a heated chamber as well.
Travel is ~26"x15"x12" . The volume reachable by all three extruders is 20"x15"x12". I have a lot of experience aligning mills and routers so this will be done properly.