this wont necessarily answer your question, just passing along my berliner experiences. i did a berliner last year and pitched lacto wlp677 first, then wlp611 four days later, the lacto fermented most of the sugars before i pitched the ale yeast. transferred to a sanke keg for secondary conditioning/souring in the closet for one month. bottled 5 gallons, kegged 5 gallons. it was a good clean, clear beer but never got as sour as i like. i have since done two batches of a sour mash berliner that have been great and are ready in two or three weeks. one got a 34 score last year, nothing to brag about but within normal limits.