I'd like to know if a simple remote usb numeric key pad can be used as an unsophisticated but functional manual x-y-z movement controller for my Mach3 based Gantry Router. I've done some preliminary searching and found no information so I thought I'd throw the question out there hoping for some helpful input. Don't really want to spend much money and the capabilities needed are basically those found using the typical keyboard numeric pad. Does this work? Is it complicated to set up? Any experiences or direction would be much appreciated.