Chuffy:Well, there you have got me because I don't CT for Stay! Sorry!
I don't either, I only use rewards, sans la clicker.
I haven't used the "feeling of a slightly tense lead" with my guys, only because I haven't needed it. But you can successfully work with the dogs' natural opposition reflex indeed, and it works well for most people who use it, as long as it's done very slowly in the beginning with very light touches, so as not to urge the dog forward (a lot of people use that type of thing as a cue to get the dog to begin walking).
I plan on teaching my girls something fun, and that is to move into the leash with the slightest of pressure (even from just squeezing the leash), or to move into the leash when they feel the leash going taut. I haven't taught it this way, but I'm thinking of it as another fun, easy way to teach LLW, because if the dog learns strongly that any pressure on the leash means to move into the leash, it will in effect prevent pulling on leash! I don't have a real pulling problem with my girls, but they'd be fun to teach. I learned about it on one of my clicker groups, so keep it in my toolbox as something I want to work on eventually, see how it goes.