rye sourdough with five grains

First post here! Started making sourdough about a month ago. I’ve lurked this site and got some really amazing insight from this community. little things you folks have shared that would just take time to understand and get a sense of. I feel that I’ve learned much living vicariously through your documented bakes :-).
I was gifted bread, by Jeffrey hamelman last December by a fellow horticulture classmate. It had sat on a shelf for a while until I got into sourdough. This bread comes from that book and it’s been a great resource for me. I scaled it down to make a loaf.