Denny,
I looked at this rebuilding verses buying new thing on the wheel/brake parts. I decided that since I could buy new one, I would risk the rebuilding and having one fail shortly after. On our truck(2 Ton) its a lot of work to pull the wheels, hubs and drums to fix a bad cylinder. A pickup should be a little easy, but who wants to go back and redo stuff. I will say that we bought a new Wagner master, and it failed with a few months, but they replaced it free. Its kind of a crap shoot on whether or not to replace or rebuild most of the stuff on the trucks. Since I can get all the parts new from Wagner, I think its better to go with factory spec stuff, even though I have the tech to rebuild them.