I frequently break for hours between mash and boil (after sparge) and have seen no ill effects. It makes a brew day more feasible if you need to run errands etc
I brewed the quad last weekend and exceeded my target OG by about 30 points, likely due to a long beta rest. Arrived at 1.12 and watching the temp to prevent esters / phenols from getting away from me.
I do 1 or 2 gallon batches BIAB. I have one dedicated cooler that holds four 1g carboys and I try to keep it full bw brews in primary or secondary fermentation. I fill it up with about 6 inches of water or starstan and swap out ice packs every 8-24 hrs depending on my temperature needs. It's low...
Sorry if someone else suggested and I missed it. I live in the heat of central Texas so i understand. Have you considered using a swamp cooler?
Also all the dry yeast packs I have had are flexible.
Oh as for fermentation temp, I'm shooting for 70° but use a low tech swamp cooler to keep out the Texas heat. I swap out ice packs twice a day so the temp is always going up or down. I know it's faulty but I make some killer brews in the cooler
Really appreciate the kind words. I'm catching some flack on the "sour" thing for sure. Seems that a true sour includes pedio and lacto too. Oh well I think I like the Brett best anyway. This was confirmed when we got Victorys Sour Monkey (Golden Monkey w Brett) and I liked it better than some...