Back to brewing after a long summer off and I failed to remember we only have one 2L flask to build a starter. I'm wondering if there's a chance I could just make one big, stepped starter (built based on yeastcalc.com) and pitch that into an 11 gallon batch of 1.059 stout split into two carboys or if making one big starter in such a small flask would stress the yeast too much. How would you all approach this?