The dough told me at hour four and I did not listen. Next time pull it when the
edges dome, not when the clock says so.
Notes on the starter
Switched to a 1:5:5 feed and the sourness dropped off noticeably within three days.
Peak is now around six hours instead of four, which suits an evening mix much better.
Things that turned out not to matter
Filtered vs. tap water — no difference I could taste
Expensive banneton vs. a bowl and a floured tea towel
Scoring pattern, beyond one decent-depth cut for expansion