Northern-no offense, but I do some PP, as well as just good common sense horsemanship without all the "savvy" lingo. I HAVE an LBI, and what works for him is good common sense, same as any other horse. Make the right thing easy.
That means that he gets worked, any way possible, until he decides that going forward is the "way out", and the easiest thing to do. I do know that Christopher is somewhat right-when my guy gets "stuck" disengaging his HQ is about the ONLY thing that I can do to free him up again.
Personally, I feel it is a mistake to close your mind to anything or any one other than a "PP student". If it really is that closed you are missing a lot, and should probably post this on a PP forum, not here.
Open your mind, you might actually learn something!