Mainly a whole load of polishing and fine-tuning. My spec features a tall crane - so how tall is a tall crane? About 120 feet if you google the experts. And what rank should my police officers be? Detective Chief Inspector and Detective Sergeant, I think, having queried various police websites. And where should I add something to build on the budding relationship between two of my minor players - still working on that one. etc. etc.
So, it's been a day of fiddling really. But the spec's much better for it.
Tomorrow's a day with my daughter. A bit more fiddling on Friday and it should be in a good enough state to be shared with a few trusted folk. Then the nail-biting begins.
A little bit of good news today. An independent radio producer has read some of my work, seen some of my ideas - and likes them. We have a meeting next week some time to discuss submissions to the BBC.