So many slippery currents to avoid. So many rocks to anticipate. It's dicing with death to mix two styles like this, there's no way I'll be able to sustain it through an upper case. But I have to try.

It's as I anticipated: the parents are turning out to be far more gruesome than the alleged offspring.

Thanks, Frodo. I'm thinking that in the upper case the tops should have block serifs and the bottoms wedges, but maybe that's a bit too formal for a schizoid font like this. I quite like "spanners in the works" so maybe it should just be the occasional glyph which goes thud! It's quite fun working out which ones the clangers should be.