I asked my husband how he doesn't get tangled in a web of yarn while knitting. He says "I'm the spider."
But the scarf you're looking for. It started simple enough, with winter in its panging death throes I asked doe eyed if he could stitch together that red and white stripe that's Shepard's emblem in the fight against the Reapers. And if he wanted to try a crack at the N7, go for it.
A couple of weeks later, this is what he made.
And here to model said N7 scarf is the most photogenic member of our household: