I also grow with height constraints but I went with a scrog instead of LST, although they're quite similar techniques. First grow it was a bit tricky not knowing what to expect and not knowing when to stop training them. However, once you have the plant in front of you it becomes clear what needs to be done. I also looked at a lot of other grows to get a better idea what to expect.
vaporhaizer, nice tip on the pipe cleaners, I might give that a shot. At the moment I'm using plastic twist ties, like the ones keeping cables together, seems to work pretty well also.