I just watched the Endless Eight - which I liked much more than I thought I would. I was pleased that they had to confidence to go there and didn't feel bounced into including many variations for the sake of it. I had a shrewd suspicion what the problem was from the second iteration, but I think I was at an advantage because a) you'd hinted that there was a solution, and b) I've spent many years nagging children to do their homework, so am sensitized to shiftiness in that regard.