You ask the hard questions, Dave. The copper seemed unhappy to take anything but a singel flare. And before I answer those other questions I believe I will google bubble flare, double flare, and pipe thread.
It may not be the easy way, but it is the Cowboy Way - Ranger Doug Beware of the stories you read or tell; subtly, at night, beneath the waters of consciousness, they are altering your world. - Ben Okri 1953 Chevy 3100 1960 Volvo PV 544 1941 Chevrolet Special Deluxe