Bought my second car this week!

[MadMan]

Originally Posted by Electronic M

At that point I found the starter motor and was able to confirm correct crank voltages to it while it was refusing to crank.

Well hey, that's a perfect confirmation. Glad you found the problem. A starter with a dead spot can have very weird intermittent problems like you had. I've had lots of terminal lugs break out of starters. It's usually bakelite, made extra brittle by years of high temperatures and hot/cold cycles. New ones don't break easily, but it's always important to know your medium when you're tightening a bolt.