We did our first 10 gal batch a few weeks ago, and it's time to rack to secondary. We plan on using 2 5gal carboys. My question is, will the beer be consistent throughout the 10gallons? Over a period of time is there any separation that occurs in the fermenter? I'm slightly worried that the lower half of the fermenter will be a different beer than the upper half. Should I agitate the beer to ensure a good mix, and possibly risk stirring-up the yeast cake? Am I making sense? Or just talking crazy?