Mash in @ 45 C for 15 minutes
Over two hours raise in steps to 78 C
Hold at 50, 55, 60, 62, 65, 68, 72, 75, 78
I used BIAB with a second water heater set to boiling. Mash in thick, add a couple of litres of boiling water every 15 minutes to raise the temp to next stage. Some gentle heat may be required on mashing vessel
yeast is a combo from a slurry - Mangrove Jacks empire Ale and Tripel yeasts. I used about 800ml of thin slurry. Attentuation hit 90%.
Wort was cubed (stored in plastic bottle) to cool slowly (no chill) Half was decanted to fermented, then the remaining in the bottle was shaken for about 2 minutes to aerate. Easy to shake 10kg than 20!
At writing I'm day 7 of ferment. gravity is 1.009. Will cold crash, fine, keg, bottle and enter to comp. tasting great - I didn't have pilsner malt but figured the slightly more complex ale malt may have worked for a BGS in a simple smash. Seems I was on the money.