I have just finished the first day working on this issue and removing the high pressure line, along with he return cause to me it felt like you have too. And I can say this is one very tricky back killing DIY project! Taking down the K member will make life much much much easier, I have no idea hot to put it back in because the high pressure line goes around the k member and when I try to put it back through the engine bay the angle just won’t let me insert the new line it..
I am extremely frusy