i use a 25 gallon tank with an on demand pump and gun with 20 ft or so of hose. i mount this get up to my jrco bracket that is already on the mower for the spreaders. this way i can drive the machine anywhere i need to get to to spray shrubs. it has worked well, i dont treat a very large amount of them, only what i can do in about a days time, for three sprays a year. i just pull this unit on my lawn trailer. most of the time i have a tech with me drive the machine around and keep up with me around the yard. i spray all shrubs and smaller trees with this no problem.