I had purchased this PanaVise years ago. I think they have been around almost as long as I have, the 1950's I believe and that's been awhile. This is an amazing tool. I couldn't be without one very long. It isn't the highest perfection, super precision. micro adjustable vise out there. If it was, I probably couldn't afford to buy one. This is an example of exactly what (quality) is needed in a positionable vise and works wonderfully doing it. The price is exactly where it needs to be to keep the maker in business and make customers happy. Yes I am a happy user.
It needs to be portable in my applications. PanaVise makes some interesting bases for this and all their versions. I highly recommend perusing their website. I copped out to using a low cost baseboard but I have my eye on some of the factory made options.
In earlier pictures of me working with this vise you will see it screwed down to a rather crappy looking chunk of plywood that had ragged edges. After I built my sliding low level shop bench, I improved the mounting to what you see now.
PanaVise has a clamp on mount and a lower profile base and a special low profile head. Lots of options. But everything I looked at and considered would have me working far above the top level of this bench. AS you can see in the last picture, the work level here is almost exactly the same as the bench pin. (That's good!) The important thing is there are no rules or critical dimensions. I haven't yet spent any hours working with this setup but it certainly looks like I will be.
I am having fun!