Jeanie and I just couldn't wait any longer and cast on...
And this is what we experienced:
knitting the edge on needles US 1 is sooo tight!
I changed the needle size to US 2, that fits me, but to my opinion it's still too tight.
So I'll frog it again and will cast on more stitches, leaving less increases above the edge, so the number of stitches above the edge will stay the same.
Of course it's also a possibility (Jeanie wrote this) to simply start casting on the number of stitches above the edge and once the sweater is finished, simply knit the rims (or edges) upside down on the sweater.