Re my travails upthread, I failed to get the pistons to retract, succumbed to LBS as I needed the bike pre-Swinley visit. Turns out they were fucked so had to run round various shops to get a new set of brakes in time. Thankfully Evans had some in stock and on sale and Balfes boshed them on.
Had a great time with the third child. And was able to stop, so - expensive, but worth it.