Does the Pod Lock for S series Harris bipods truly lock that mechanism from swiveling or does it still allow some swiveling when the trigger is pulled? Right now my right friction lock leg shortens a bit everytime I fire--must be the right twist rifling? So, I purchased a Harris S with the leg notches thinking I would solve that problem. Haven't had a chance to fire it yet, but is sure seems that no matter how hard I tighten the knob (tried a wingnut on there too), it swivels quite easily. Have I just traded one problem for another? Thanks for the input.