I picked up Shingle again this weekend.
I wasn't looking forward to it -- when I last put it down I couldn't figure out how to reverse the slip stitch edging from the left front, and apply it to the right front. I was stumped.
Now I'm pretty sure if you are reading this you are wondering where the trouble was... and you'd be right. All I can put it down to is a brain freeze, because when I picked up and knit a swatch this weekend it came straight away! Yay!