Right chaps, had a bit more time to play with the machine and iron out some faults, it appears my motors seem to stop working off their own accord, if you jog it one way then it move fine until it meets a slight bit of resistance, then it just stop's, but makes a horrible noise and tries to move each way slightly. My motors are anchuan 57hd0401-15sb. Im hoping that this is due to the severe lack of torque? My theory was to buy a new set of motors anyway with my installing the larger spindle, so I may purchase just one new motor to clarify that the low torque is the problem. Anyone had any experince with this type of problem?