Hamelman - Deli Rye

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Hi All - Trying Hamelman's Deli rye recipe for the first time and wanted to se if anyone has any experience with it?  Doing this in a loaf pan and need to increase the recipe slightly to get a little taller loaf.  Wanted to see if this was consistent with your crumb.

I was a little surprised at how stiff the starter was, anyone made that more of a "levain" consistency?  Wondering if that might open up the crumb somewhat.