They're done! I finally wove in all the ends for the socks yesterday. The 1x1 twisted rib at the cuff is super stretchy, and I think I'll use it more often for sock cuffs, but it took f-o-r-e-v-e-r. Next time, though, I will use MUCH larger needles to cast off with. Even though I thought I kept the cast off loose it is not as stretchy as the 1x1 rib. The yarn is itchy... but I think that will be resolved after the first wash. Overall I'm pretty pleased with how these turned out.