Zero Position Master is what I did. I still have the original factory mastering data that was in the robot originally and on the Master Data Sheet we got with it. When we had that mastering data in the robot though and drove the robot to all Joint's Zero - the Robot's J3 was pointed downwards about 45°, J4 was turned about 15°, J5 downwards about 45° and J6 spun CW maybe 10°. FANUC said they probably did a Fixture Master on the robot at some point before geting to us and that's why the Factory MDS is off? We have values in our Single Axis Master page as well.
I've never had a brand new robot from FANUC come in with bad mastering data before, so this is all new to me.