I have an Practical CNC cutting table purchased in 2005. They are now out of business. I have had virtually no problems with the equipment. I did upgrade the flashcut box to the usb model, but otherwise no changes. I now have some intermittent interruptions in cutting, which I believe is the ATHC box. Does anyone know if I can purchase this item somewhere? What about the other components of the Practical CNC table? Would like to refurbish the system. Thanks.