I believe that the particular dynamics of the PCNC1100 do in fact contribute to the pullout problems that I have experienced with TTS on my tormach mill. It is quite possible that the machine dynamics of a different design, such as the Torus Pro, would not experience chatter conditions in the same manner as the PCNC does. My pullout problems are significantly reduced (nearly eliminated) when I change out my power drawbar springs for a solid bushing, for example. I believe you are using a screwthread-tensioned drawbar arrangement on your machine, is that correct Ray?

In any case, I don't believe you can accurately state that TTS works the same on any machine, at least as regards this issue of chatter-induced TTS toolholder pullout, using a typical R8-collet TTS setup.