I'm going to do some double brew days to fill my biggest fermenters and I know I'm going to have to get my brew time down in order to do so. Right now I do a long step-mash and a really slow sparge. I also do a 90 minute boil on most batches, but I can cut that down. Given that tun and boil kettle wouldn't have to be cleaned thoroughly between batches I could go from one batch to the next pretty quickly. Since I use my electric boil kettle as my HLT, I'm a little limited. I may be able to set up a second boil kettle (gas-fired) so that I could be doing the second recirc mash while the first is boiling. What's your quickest turnaround time from dough-in to fermenter?