Hi Folks - first time post here and a big fan of the videos.  I'm trying to optimize my sterilization process.  I'm currently using 23 quart pressure cookers with 4 x 6 pound blocks in each.  I've seen lots of guesses about how long folks should cook their blocks, from 30 minutes to 3 hours,  but has anyone actually measured this or have a calculation to estimate how long you need to cook 6lb blocks at 15 bar to have the centers reach 212F for 30 min?  Btw, my substrate is masters mix.  Thank you in advance!