King cage bottle mount

I’ve been looking for something that will allow me to move the bottle cage further back so I can keep my computer where I can see it (I’m new to using power and need to keep an eye on the computer to keep steady). It looks likethis might do the trick, but I have a couple of questions. Does this replace the top cap of the headset, sit on top, or underneath? Has anyone had any problems adjusting the headset properly with this - seems like to get it tight enough to keep the bottle stable you’d need to tighten more than is appropriate for the headset. Thanks

it can sit both ways on top or on the bottom, it does not replace the cap and no issues tightening it down, it takes about the same size as a regular spacer
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it replaces the stem cap.

it helps to flip the bottle mount over for a more level fit over the stem. i was drawn to this set up for the same reasons to be able to see the PT head unit.