[strictlypersonl]

The stock Jag rear dampers:
13.3" extended
10.3" compressed

The QA1s:
15.0 extended
11.1" compressed
At full droop, you may get universal-joint binding.
You will lose approximately 1.5" of compressed travel from ride height.

If they worked on the Unique, it might be that their top mounts have been raised.