The craigslist gods have cast their light upon me! An original Pyrex 12 gallon glass borosilicate carboy. While more or less impossible to find used, they are available new – just get ready to give Amazon a month’s worth of rent.
One fermentation vessel down from two means less cleaning but what I’m most excited about is the increased exposed surface area for fermentation. The 6.5 gallon carboys I have been using have ~95 square inches of surface area at their widest while the carman has ~175. It’s maiden voyage will begin with some wheat, some barely, a bit of WLP300 and no stopper. Let’s see if we can get those esters cranking!