I have ordered the Revolution Xl with a dual extruder from QU-BD.com, but 3D printer delivered is a single extruder, which by the way has inconsistent extrusion rates as shown in video, and also not delivered before Christmas as promised. At this point I am not at all satisfied with the poor customer service I have received all along. I have sent QU-BD several requests for support and Paypal has been notified of this scam.

So, for example, Extruding at 150mm/minute @ 230c extruder temperature, the extruder slows down every ~15seconds! This makes for poor quality prints! Out of the box!

свернуть