[Ahem. Update: this was just wrong, because I misread the defn of POGA-C; see comment 2, thanks to TC. To avoid polluting the record, I’ll delete the rest of this post, but there’s an archived copy at http://www.webcitation.org/6JMTX0nGx if you like. The paper fairy has now delivered a copy of K+X to me, so I expect to post a “take 2” later this evening. Or maybe tomorrow; I might actually try reading it properly this time.]
I have a take 2 if you’re interested, but its dull.