Wouldn't that tart have bombed if you'd planned it out with real measurements?

Man, that 3-flute trick is slick, did the lead show you how to keep the chamfer from washing out the hole size on the tighter tolerance ones? I'd be worried about blowing a dimension on something that gets checked with a pin gauge.

Oh wow, yes! I read something about this in a book on habits, where the author said the streak number matters less than hitting that point where the behavior becomes automatic. For me it was around day 30 with drinking water in the morning, and once I passed that, missing it felt weird, like leaving the house without my keys. The 100 day mark was cool and all, but it did not really change anything in my head. Day 30 was the day my brain actually flipped the switch. So your day 40 makes total sense to me.