There have been several versions of a plugin for Mach4 and the XHC WB04 controller. I'm working on one currently as well. Mine will not require a driver at all. Just plugin the dongle and my plugin finds it and connects. Right now it's very much a work in progress though. I have alot of functions working, some well, some not so well. mpg is not working yet as I haven't spent alot of time on it yet. Within a couple of weeks I will have it working good enough for a release. Currently I have the plugin, with a config dialog for entering the macro's in, a diag window for viewing the data being transmitted. One issue I've found is that the device will goto sleep on you. until you move a dial or push a button it will stay sleeping.