"Charlie" has Overheating probs- Here are my Clues and please chime in with opinions!

Did you have the engine running when you refilled the radiator?
You might have an air bubble in the system.
Just my 2 cents.

Yeah, did indeed. Filled it first, then started it and let it run while pouring additional coolant in- even idled it up a bit and added more as it "pulled" the level down a bit so I could kinda overfill it.