I wrote part of this thread in the "Equipment for Sale" Forum but I thought I would bring it over here. I am really confused over the lack of dual hose/gun/injection system information on the web. It seems as if the industry is moving away from this and I'm trying to determine why. We just purchased a TGCL Rhino truck that is equipped to have the injection. I am having a hard time finding spray guns for the dual hoses. I have seen the Gregson Clark gun and I'm considering it. Seems like that is the only one! Why? Given the increase in Integrated Pest Management and the Green Movement, I would think that this is the way to go. Pros? Cons?