Yes, that was the issue with the Duroflex joints and using a jj at the other end. the durometer is just too soft to allow any fight back of a jj when misaligned. Like I said, I could be way off base here. I used to run Currie arms up front, and a jj will be where it wants to be. As an example, notice my driver side lower arm and where the jj is misaligned at. that is sitting in a level parking lot at work during a normal commute to work.
View attachment 67809
I've had those Currie arms on a bench vise before, and I can tell you it takes some effort to misalign a jj. Having a different joint at the other end that wants to self center would take said joint some muscle to bring the jj back to its center, IMO. Is a Synergy joint up to the task?