The good: I did it. I folded it long ways to make a full-length UQ rather than short-ways to make a 3/4 length UQ. Hopefully it's wide enough to work. If not, then lesson learned, I've got a few more PLs on the way from a cousin. I also integrated a zipper so I can put another layer (fleece blanket or something) between the two existing layers for colder nights.
The bad: I broke five needles doing it, and it looks like I sewed it with my feet instead of my two capable hands.