OK.. so they say education is expensive.... gotta accept that first I guess.

I pulled the trigger on a hydraulic double flare tool. Works sweet on steel lines ( 3/16 ) but simply won't hold the tubing for the stainless. I'm cranking down on the hold pin as hard as I can without putting a tool on the handle. I had even considered adding some extra hold down bolts on the die, but if I put enough stress on the die to hold the tubing, I'm probably risking breaking the tool. I figure that if the manufacturer wanted you to put that much clamping pressure on the die, then it would have been made different.

I know the concensus is that you can't double flare stainless, but I figured I may as well try it since I have the tubing and the tool.

So, new fork in the road. Should I get the AN fittings, and a 37 degree flare tool, or just go with standard steel lines. I'm leaning towards standard steel at this point. After all I would probably need another super tool to do the flare, right?

I got the s/s fittings for the 45 degree double flare: it should be no problem to use them with standard steel tubing?

At the local parts store, they have some coil tubing with a grey coating on it. Supposed to be super corrosion resistant. Anyone familiar with it?