After cleaning up my arm injury last Monday (it is healing nicely), I was going to put the chassis on my dollies...I noticed movement in the left rear .... So I took it apart to investigate. I assumed because the other side went together fine this side would. The hub did not go all the way onto the stub axle and there was no preload on the tapered bearings. Cleaned up the burr and now have 100% engagement as planned and no more axial movement. Waiting for sealant to cure, then reassembly hopefully tomorrow.
Continuing to clean up my mess....