PST 16:1 Box excessive play

How many complete turns are you getting when turning the portion of the box that attaches to that column ?

James From
PST

I turned it all the way to the left and counted 2 1/4, so maybe it was just me.

Also, what the best way to be sure the box is centered when installing? I was thinking turning it all the way one way and then going back until I saw the grooved spline pointing straight