Thanks, Eevee - I had no idea about this. I better collect those 2 micro-cents!

No, I still work on this problem every day. My goal is to acknowledge a passing feeling many of us may have, the sometimes emotional difficulties of working hard on a big challenging problem, and the difficulty of figuring out what exactly to do. The conclusion I draw is that there is probably something I could do, despite it sometimes feeling like a big unsolvable problem. And I do it!