This didn’t take nearly as long as knitting this size/shape, maybe 3-4 days. It is a crocheted Moebius strip scarf, can be doubled around as a cowl.
I know where I made my mistake: I used every other stitch in the foundation chain, running up the center, rather than using every 3d stitch. Once I realized my error I wasn’t of a mind to rip it all out and do it again, but now I know better and will do it differently next time.
I think next time I will use that bit of insight deliberately, but for now, this one is as done as I plan to make it.