I still think that trying to lower your TV, will be more expensive than raising your trailers height. As for trailer stability, the article explained this also. As you have noticed, adjusting your pin box and hitch will not work in correcting this problem.
Just think, your truck bed height is so many inches off the ground. Your trailers snout is so many inches off the ground, when level. Thus if you do not have a least that magical 6" between these measurements, NO amount of adjusting the pin box, ETC will solve your problem. Either the trailer has to be adjusted higher, or the truck lowered.
