National Sweater Knitting Month (NaKniSweMo) is upon us again, coinciding with “NaNoWriMo”:http://www.nanowrimo.org/ as usual. I am contemplating a new take on it – new to me anyway. Instead of casting on yet ANOTHER sweater, I’m going to estimate the number of stitches left to knit on the three main sweaters that I currently have on…