Well, you guys were busy while I was train-hoping.
As for the weakness of (tubing) close to bends.
PS: I've NEVER, NEVER under any circumstance seen STEEL 'break' ----It bends, bends a few times before becoming to the 'break' point.
And I'm not doing Alloy bars. Alloy bar + Steel stem = disaster...and one time use for both parts because they fuse so fast it's stupid.