It was an interesting article and a good read. I think there is something slightly ‘off’ with the recipe‘s process though. Not sure if all those transfers are accurately listed. But it was certainly a good article.
I'm using this technique (kind of) for a NE IPA using Tree House yeast from a couple cans of Julius. Fermented in a bucket with tons of dry hops in a paint bag. With about 4 points to go I transferred to dry hopping keg with a bunch more hops in 3 tea balls. That is where the beer is now...
I've used the KAB4 for years when making 5 gal batches and have zero issues with temp control. If desired, it heats VERY quickly (which I love) and can maintain a nice, easy rolling boil using very little propane. I love it.
I'm on my 5th gen or so using this yeast to make NE IPAs. I pitch at 62 degrees and keep it at that temp for 5 days. Then I allow it to finish at room temp for a 14 day fermentation. No esters to speak of. The cool start also helps mitigate the huge krausen this yeast throws.
I brewed up an AG batch of this over the weekend:
9 lb 2 row
1 lb wheat
0.5 lb flaked oats
0.5 lb flaked barley
0.5 lb flaked wheat
60 min: 0.25 oz Northern Brewer (10%; had this lying around)
0 min: 1 oz each FF, Summit, Citra
After cooling to 160: 1 oz each FF, Summit, Mosaic
Cool to 62...
My modded KAB4 is still going strong and I wouldn't hesitate to buy another and pay 20 bucks to improve its design slightly.
https://www.homebrewtalk.com/showthread.php?t=259864&page=3