For others out there. This was one of the best $60 I have spent. Took maybe 15 mins/drive to remove and install new gimbal bearings with 10lb sledge. As it tightens it straightens out the helmet and pulls the bearing out on a straight plane. The alignment tool tightly fits the bearing cup on it and driving it home is easy. Then use the alignment tool to correctly aligb the bearing to your coupler.

10 pound sledge hammer to install

It was a "controlled" 10 pounds...