#3 is good advise but I will ad..... Normally you will/should have a straight section of tube in the line, hopefully at least on one if not both of the ends. Add a few inches to your length before you start bending just to be safe, better to have to cut a inch or so off at the end rather than have the sh**, F*** factor, and now you need to cut down, uses a coupler, and ad some length, or have a bit of a bent up mess under the car. . #7 'could' come back to haunt you. Other than that............