Had this vise mounted on my bench. I have since repurposed the bench to hold my forge. The vise needed a new home. This is what I came up with

That's a nifty stand. Are you going to bolt it down?

I'd suggest that you rotate the vise&support 180 degrees so you are standing on the plate when using the vise---MUCH more stable. (assuming that's a metal plate it's on and not a concrete column...)

The stand is sitting on a concrete pad. I will be anchoring it to the slab.

OK that works.

Today I was using my "solidly affixed" postvise to hold some 3" x 1/2" wagon tyre while I was cutting it by hand with my 20" blade hacksaw.  It's amazing how much better a rigid setup is in use!  (Which is why I have a postvise mounted to one of the telephone poles holding up the carport at my rental down here.  The portable postvise is to aggravating to use for larger jobs...)

Have been a woodworker for years. Having your work secured makes for higher quality  work. You can focus on what you are doing, instead of having to adjust to what is going on.