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It makes sense the cooler lines don't need to be precisely bent. My first experience using this tubing was doing fuel lines, and they did indeed need to be more precise, being fastened every few inches.
The mock-up on the floor is me measuring the old lines, not the finished job. I was trying hard to learn some way to document their manufacture, so I could explain to anyone how to do it. This was a failure.
No, I don't do this work for my living, and I'm quite certain I'd never make it if I had to. Also I'm afraid the fun would go right out of it when I found it necessary to keep track of time.
Here you see a k-jet return line. The third photo was the second bend done, after making the mistake of not sliding the nut down to the flared end before doing it. That's why I chuckled at your advice to put the nuts on the right direction. From the internet research I did after failing to get the KD tools version of the flaring tool to hold Bundyweld tightly, I got the impression the best mid-range tools were made by Ridge and Imperial. One could spend a lot more than I did. The last photo shows the old and new side by side.




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Art Benstein near Baltimore
Wise men speak because they have something to say; fools, because they have to say something -Plato
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