I had the DSS driveshaft installed a couple weeks ago and life was good. I just had a Whiteline Watts link installed today and I've picked up the dreaded driveshaft vibration. I'm going to road test with the lead tech tomorrow morning so I can show him what's going on, but would appreciate any insight on potential causes in advance. I have an adjustable UCA and PA was reset to factory specs when the DS was installed. I'm not sure the Watts Link would have changed PA, but maybe it did? You do have to recenter the axle with the adjustable arms but it shouldn't have changed the ride height. I had them install in the lower of the two sets of holes for roll center.