Anyone can join, with a 50-word vignette in the comments.
"We'll have to titrate it," said Rosa, briskly. "Only way to do it, the precision is too important."
"Slosh it about," said Talia, "and there's no way to put a brake on it, we'll overshoot."
Tristan let his breath out. "Remember we haven't got forever. Perfection takes too much time."