Thanks Ed- I think I figured out the issues- Firstly, the back jaws on the Tapmatic were not "centered" I had to loosen the 2 tiny set screws and then insert my tap- then tighten each equally. This was a big part of it. Secondly, I decreased the distance of where the stop arm was contacting the brace I made and installed on the press table. This has all but eliminated the "clanking" Tapmatic is working perfectly now. What an awesome tool!