· Second, I haven't found a worthwhile Clausing 8520 or similar. I would appreciate some cold, honest feedback on product "quality" from anyone who own the Grizzly (G3102) or Harbor Freight (40939) 6x26 vertical knee mills. I can get the HF shipped to my door for 1600 while the Grizzly runs 2900. That's a hell of a price delta.