Jon,
Don't be intimidated with making lines. If you have average mechanical aptitude you can accomplish the job. I am also in the copper nickel camp, the metal bends/flares way easier than other products. The real nice flaring tools exceeded my budget. A run-of-the-mill USA made Sears Craftsman flaring tool (~$40) has worked satisfactorily for me provided that the lines are clamped into the die REAL tight before you start flaring.
Paul
