^^^^
This is what I use.
Except I use the folding akg stereo bar.
Same risers though. Works like a charm.
Cost effective too.
How critical is this vertical displacement? I've gone to great lengths to keep the mic bodies just a hair apart in coincident or near coincident pairs. I looked at that Shure vertical bar at one point and discounted it based on the vertical displacement distance.
It's not critical if the spacing is withing reason.
An inch or two is no big deal.
It's the only way it works with the vert bar.
I've never had any problem with it.