I found the Ka-Pow. It came fairly late in piece, in the last three shots brewed about three days ago (sorry, absolutely slammed at the moment, no time for anything). It meant a fairly fine grind (which I need on the BZ99 anyway, pressure's too high) and a good flush to get the temp down. A ristretto pour worked best. Full mouthfeel, strong rich 'dark' flavours and no hint of the wet dog flavour that can permeate an MM infused brew. All in all, exactly the kind of espresso I like. And not at all like my most recent experiment which is not great as espresso but my wife is loving in milk.