"Bob La Londe" wrote in message
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The base was keyed to the table. Not the vise to the base.

Keeps the degree readings relative to the table axes and not a
random
orientation.

Makes sense. I can't mount it square on the no name anyway though.

I received an RF-31 from MSC whose slots were slightly angled to the
table motion. I made keys to fit in the slots and then milled small
shoulders on the top edges, automatically parallel to the travel.

If you ever swivel the vise, see how repeatably you can realign it to
the marks.

jsw