Thanks for the correction and the warning on celluloid! I could have seen that go up in flames :(
I did the heat then the bar, but thought about doing it the way you mentioned with bar first. I was just scared of how much I'd have to bend them cold.
I did a practice run on some others first and found I didn't have to get it crazy hot.
I kept the gun away and let it hear slowly for a long time. I'm positive I had some beginner's luck too.