"I just set inputs on the preamp to 2.8v - up from 2.0." What does that mean? And are you referring to the phono stage or to your linestage?
Referring to my line stage, just in case the distortion was happening there. It may actually be both, in the sense that the hotness of the cart combines with the high gain of the phone preamp to create a cascade of distortion issues.
I don't think it is an alignment issue, in the sense that it happens with two different TTs and I recall having had this issue for a long time - I just hadn't focused on vinyl for a number of years and am now re-living what I had thought was the issue years ago.
The challenge is that I really do not want to waste my investment in all of these 2M carts or in the Pulsus phono stage. But they don't seem to like each other too much. The Pro-ject phonostage sounds OK...but it isn't at the same level that the Pulsus is "supposed" to be...at least judging by price and reviews.