guys, most of you know, first season getting into fert/squirts. Plan to do dry fert with Lesco spreader and will use backpack sprayer for apps. 4 gallon Shurflo battery powered most likely. Will only be looking at doing resi's, 8k sq ft and under, due to the limitations of the backpack. Will need to blanket at least one app with the backpack for each of my customers - with good coverage, spot spray the remainder. Due to my relative inexperience as an applicator, and the use of a b/p for blanket spray - would it be wise for me to use a marking dye for the first round/(or season) so that I get proper coverage of herbicide? I am concerned about my quality right out of the chute and don't want to be willy-nilly with my apps and lose my biz straight away. If you think a marking dye would be a good idea - what brand/s do you recommend. I have heard some say the turf looks like a smurf when finished....not sure I am interested in that extreme. Thanks!