So, I have a new tank, with a two-stage regulator (I think that's what it's
called).  I had to shorten the copper lines.  But we ran into a problem
with one that stripped or something in the flaring tool and I had to cut
another inch.  I went and got an elbow and some other fittings from the
hardware store.  I'm having some doubts about getting this all to line up,
etc.

Is there any kind of flexible line I could safely use under there to
connect the tank to the copper lines running in to the van?

Thanks,

mike