I figured I'd post this little experiment for anyone that doesn't believe stockinette will curl or wonders about sewing fabric to yarn.
After hanging for quite a while, my stockinette scarf curled awfully. A little curl I could deal with, but I really like the colors in this one and was to the point where I wouldn't use it because of the curl. I didn't see the thread about how badly stockinette curls until I had finished this. Anyway... I've attemped to de-curl it by sewing a cotton fabric backing to the purl side. I'd never sewn yarn before so this was all an experiment.
Other than the edges being a little ziggy I think it turned out ok and it's super warm and heavy now! Plus nobody will notice the edges but me anyway. I can't see the red thread on the yarn side either!
It's now in the peg-hanging experiment stage. (crossing fingers)