Anyone using a Dosatron or Chemilizer as a portable spray rig? Have been looking at these things and wondering if I could rig one up in the back of my truck for low pressure apps. Two hose reels, one reel to connect to the water source and one for the spray hose. I don't do apps all day so if it takes a few extra minutes to set up it's not that big of a deal and I could use the extra space in my truck not having to haul around a tank full of water. Any comments?