That NiCu tubing is butter soft and easy to bend. The bad part is, it's butter soft and easy to bend. Has no rigidity and won't hold it's shape, or it's straightness.
I don't want to use clamps every 6 inches, or have stuff look like limp spaghetti and/or get knocked out of shape easily I've been using the steel Bundy-Flex stuff forever. Roll it out, straighten it. Use good benders, Holds it's shape when you bend it up.
3/16 line is definitely soft but I've not had issues with it losing shape. 1/4 5/16 and 3/8 are plenty stiff.
I'm not sure what costs more, fancy braided line or good flaring tools and benders.
