By Jason Feulner, Finger Lakes Correspondent During a recent visit to Dr. Frank's to compile a profile of its sparkling wine operation for Life in the Finger Lakes, I learned more than I expected to about the hard economic realities of creating such wines in the Finger Lakes. As nearly all Finger Lakes winemakers will profess, the region is well suited to making sparkling wine. Because of the cool climate, and a wide open harvest window, growers can let grapes hang just a little longer to enhance ripeness and flavor without sacrificing the crisp acidity necessary for good sparklers. Two of Dr. Frank's team winemakers who work with sparklers, Eric Bauman and…