I too have the PP3. I have found that if one backs with too much of a jack knife, or turn too sharply, that yoke will tend to slide. i think it is made to do that rather than break pins, which the Hensley is designed to do as I understand. When that happens, I notice it may crab a little in its tracking behind the TV. I just loosen the nuts on the u-bolts and adjust, and re-tighten. Did have a problem with one of the jacks leaning out, and solved wiith some steel plates on both sides of the frame under the WD jacks.
