Can anyone vouch for whether these cheap units are useless junk or usable junk? The center height is what the doctor ordered for me but options are a bit limited. Thanks.
http://www.ebay.com/itm/CNC-Mini-Lathe-Tailstock-Chuck-80mm-For-Rotary-4th-Axis-A-Axis-Router-Machine-/311765921105?hash=item4896b26d51:g:BCQAAOSw~AVYspXe
http://www.ebay.com/itm/CNC-Mini-Lathe-Tailstock-Chuck-80mm-For-Rotary-4th-Axis-A-Axis-Router-Machine-/311765921105?hash=item4896b26d51:g:BCQAAOSw~AVYspXe