I've got this nice pretty extended SS Skyjacker brake line sitting on my desk, that needs to replace the cracked stretched taut rubber one in the rear. I'm guessing I ought to just let all the fluid out of the rear circuit using the bleeders, then replace the line, and then bleed all that air out? Oh yeah theres this little copper washer that came with it, that just looking at the line doesn't look like it really goes anywhere, is that a crush washer/sleeve whatever and all will become clear when I take the old line off, or do I need to be sure about this or that when reinstalling the line? ???