Mh871-mk2 found in, uscutter mh series vinyl cutter w/ vinylmaster cut software, 34 mh 871 vinyl cutter value kit w/ vinylmaster design & cut software, please note, this vinyl cutter is not compatible with mac. You can post on the us cutter forums at r.com, submit a request for support on the support website at r.com, or call customer service at 42. Previous versions of this part for older mh models have referred to motherboard or mainboard interchangeably. How to get vinylmaster to detect usb conneted plotter with windows 10.