Thanks everyone. I'll just put the stock, non-pump backplate on and run it that way. The first things I need to do are get the Dynamix set up properly and then start trimming down the header. I certainly don't need an extra variable in the mix to mess things up.

Hobbsy, I think I see your point, except that the spraybar moves along with the slider as one assembly; they are attached to each other.

David