Now, I'm going to present my opinion across the board: amateurs shouldn't be in horses who have no recourse to mentors, qualified only by those who fortunately do succeed with dvd's & books alone; yet, proof is abundant that many don't succeed with teaching materials alone.
The horse owners who post their issues with their horses shouldn't be resorting to anonymous public forums filled with people of unknown qualifiedness! Instead, if their teaching materials aren't working for them, they need qualified horsemen to help them!
Plus, SINCE the qualifications of the forum advisers are unknown, the OP doesn't know whose advice to follow, anyway! The OP then decides to take the advice of what "sounds right"?
I'm tired of saying, "You really need a qualified horseman, in-the-flesh, to help you with your now-dangerous horse!" It's not even the lack of foresight in the humans that saddens me the most: it's that the horses are suffering for this lack of foresight!