Every change marked
v3 to v4: the recipe as it was, and as Kenji cooked it next.
350ml425ml water- Mix the 500g wholegrain rye,
350ml425ml water, starter and 10g saltintoto a paste, not a dough — 3 minutes with a wet hand - Bulk
45 hours at 26 °C, until it domes and the surface cracks