I'll second Cu/Ni over steel or stainless, unless you're looking for pre-fabricated hard lines as I don't know of anyone offering Cu/Ni yet (RSD, Inline Tube, Classic Tube, etc). We stock 25 ft rolls of the stuff and all of the steel tube nuts you may need, so while I'm sure the kit above is probably a good deal, it appears to include a bunch of tube nuts and fittings that you'll never need or use.
Cu/Ni tubing has all of the benefits of stainless with virtually none of the issues associated with cold working and the sometimes sketchy sealing at fittings.
Tobin
KORE3
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