First off let me thank Silver for the sock tutorial on knitting two sock toe up on one circular!!

I love it and it was very easy to follow/understand.
Questions though, I noticed Silver used worsted weight yarn I am using sock weight yarn. She casts on for a total of 16 stiches per sock, this seems too few for the sock weight yarn. I am using size 2 needles. This is my third pair of socks but I have previously made them where you measure your foot and do a little math and get the exact number to cast on for your size foot. And knit from the cuff down. (I know I sound like I am rambling) Anyone have any suggestions for the cast on. Making men's socks shoe size 8-9.