I cut mine with an air driven "body saw"... You can get real fine blades.
If you don't have one - they're CHEAP at Harbor Freight -- they'll just chew thru blades on the SS tubing.... Then DE BURR -- don't forget that part BEFORE flaring... and I lube the end a bit with spray silicone lube - - and then I blow them out and run some brake clean thru them...
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