Possibly, I wasn't there when he did it but he did reset the heights (with hawkeye apparently) and set them too high so they were going out of acceptable range and defaulting. That was the cause of the dancing. I tried adjusting them with blocks and one rear sensor was a long way away from the other so I thought I'd tweak the arm and broke the mounting lugs. Fitted 4 new sensors and reset standard and mway and it seems OK now but not been on the motorway yet.If he hung the axles that may have contaminated the tracks by dipping the wiper in the normally unused part of the track picking up dirt that can disturb the sensors. If done properly height settings should not need touching.