I would like to know as well. I have poly caster correction from Ironman and have developed a significant pull to the right. I am convinced it's the bushings wearing out. I am going to replace bushings and use Caster correction plates.
Broke a valve stem off in a mud hole. Then popped the spare tire. Did not have an extra stem, had to break down tires to swap rims with a Hi-lift and 2 pry bars. Thank God for on-board air.