Creative Brake Line Bending

Well i made two ends on the lines for the rear. i will see if they leak. I still dont trust the cheapie flare kits. my problem with it is the top flare to actually seal to the brake cylinder is ok, but the backside of it where the fitting presses on it just is not formed right. it looks like it will keep pressure on it, but just never seems to form right. How tight do you crank it down?