I am seriously considering adding something like a Centerline 220 lightbar system to my existing Teejet spray controller. Is it good enough that I can lose the marker dye and foam system? Reason why I ask, is I might need to do a 12 acre lawn monthly. Doing it with a walking boom is totally out of the question. Last time I did this job in 2008, I did it with marker dye sprayed out. That was ok, but doing the field 10 or 11 times pays for the lightbar system. I also want to upgrade from the magnetic proximity speed sensor I currently use. So adding that unit will not only provide a ground speed for the spray controller, it will also mark each pass.