I'm considering buying a Z-spray or exiting the business, becaue I am having to work to hard. I don't have a machine set up to do dry and liquid together, so I do too much double duty. I have some Z-spray questons please from users. I talked with Tom Rich and he was helpful, but I need some user/operator input please. Do you spray any of the colored pre-emerges such as Barricade or Pre-M? If yes, is it a stain problem at low liquid rates? Do you generally spray and spread at the same time? Is this very hard to do. Seems like there would be several switches or whatever to handle all at once. What do you do when the fertilizer spreader gets clogged. I just pour out my push model back into the bag. What do you do since the unit is mounted to the z-spray. Is there a screen to keep clumps out of the bottom of the spreader? How much work is it to change over chemicals? Does the tank generally drain totally since it empties from the bottom? Anyone in driving distance from me? I live in north Alabama and would like to see a unit. I tried to call an operator in Nashville to see how they liked their unit and i hopes of seeing one operate. I haven't been successful yet.