Downrange PC
One thing you might find interesting, dk, is that a very similar product was touted as _tightening_ patterns, the idea being that the choke, rather than jamming all the pellets together and allegedly "deforming" them, compressed them into the soft central post and so the load didn't experience any of the disruptive effects of excessive pressure.
Of course, I don't think that happens either, but if they don't sell as pattern openers, maybe they will as tighteners. Who's going to know?
Neil