O1, I have not had much success with stainless, and I have tried several versions of single and double flared. Only after putting what seems like way way too much torque for a very small wrench can I sometimes make them seal. Check out technafit.com and their nylon/braided lines. Every joint is now an AN fitting. A couple hundred bucks will get you a complete DOT stamped system. Talk to Chris, 317-350-2153.