I recently installed the digital readout upgrade that goes on the compound. It was easy to do until I tried to reinstall the handles. They don't fit on the new lead screws! And it seems that the screw for the Y axis is too long. I can move it back and forth about an eighth of an inch. Has anyone had anything to do with this upgrade? I'd like some advice or ideas as how to fix this. I can't send it back,my daughter gave it to me as a Christmas gift. HELP!!!!