So even such a seemingly easy threading pattern holds challenges! This one is deceptively easy. It’s that little transitional threading of 2-1 that interrupts the flow!
So I find I have to be diligent in focus. And even so I’ve had to unthread a couple of times for skipping that little 2-1.
I’m off to Maine for an overnight. I’ll be home tomorrow and can turn my attention once more to threading.