The last step to servicing my Super Course, the removing the cottered cranks to get at the bottom bracket, and...
...success!
Well, mostly success. The drive side came out fine, but the other pin deformed a bit before popping loose. I saved it by knocking it back in line, rethreading the post to 7x1mm, and then tapping a nut to match.
Here's the spindle.
Note the lack of wear! The bottom bracket area inside was like new, just old hard grease. It's all back together and ready to go.