I am curious if there is supposed to be much play in the plow while its raised? My ultra mount is pretty stiff, but with my uni-mount the plow wobbles pretty easily. I tightened the pivot bolt quite a bit and it tightenend up, only for a short period of time. What else do I need to tighten every so often? I check the pivot bolt, plow edge bolts and other misc bolts periodically.