I had to cast on the hood twice after I made a mistake in my I-Cord edging. I'm glad I did because I discovered the hood was going to be HUGE. I ended up casting on 120 instead (+3 on each edge for the I-cord).
You might notice this looks a lot like my Ugly Sweater, same color and to the untrained eye, similar gauge. I was knitting it at my table the other day while wearing the Ugly Sweater and more than one person stopped to ask if I was knitting the sweater I was wearing. I blew everyone's mind.