No, not too hard, but... You definitely need a small tubing bender and even then, you'd better be good with it, or they'll turn out ugly. And, I do not believe that you can get the pre-terminated ones like NAPA or Advance sells with the oddball size nut on one end of it. So even if you could buy the correct length pre-made, you'll need a double-flare tool as well to install the special nut.
