Has anyone done this. I brewed a batch using yeast harvested from a commercial brew. I was not overly happy with the fermentation or the initial sample flavours...so I foolishly dumped the yeast. Well move forward a few weeks and this beer is awesome. I want to use this yeast again and the commercial beer is not easy for me to obtain. I was thinking of trying to harvest the yeast from the bottom of my keg. I figured this would be much like harvesting from a bottle. Any thoughts, ideas or experiences to share. Thanks.