Last night I had to reknit the neck 3 times before I was happy with it. First, I had to figure out which bindoff was stretchy enough yet also looked good. Then I realized decreasing from 112 sts to 80 was too far so I ripped back to the first round of black after the last round of grey and black and decreased evenly to 88 sts.
The rolled collar was really easy to do. It was 5 rounds of stocking stitch with a loose bindoff. The loose bindoff was achieved by using a 6mm needle.
For now, I have enough yarn left over to knit a matching hat. I will definitely line it with light fleece or t-shirt material as this yarn is really scratchy. My sources tell me that using hair conditioner in the water when I wet block it will soften it up a bit.