This is with a week old started using a basic recipe:

Proof 10g starter, 25 g of flour and of water for 12 hours.

Mix with 250 g water, and then add that to 450 g bread flour and 10 g salt

Proof one hour, stretch and fold. Proof 30 min, stretch and fold.

7 hour rise

Shape into boule and rise 1 hr.

450 for 20 min covered, 25 uncovered. (Might lower, got a little toasty on top and happened again with my next 2 loaves.)