Our mowing outfit uses ZTR stand-on mowers. (like Z-Sprays). They are limited on hills/slopes and wet turf. Going up hills is dangerous -- popping wheely's just before they tip over. Zero turning on wet turf also causes turf damage. Ground Logic is merely an improved Permagreen. Good luck with that unless you are a serious LCO. We tried the Ground Logic, and we tried (all sizes) of Z-Sprays. We run three T3000's. Here's a photo of two of my T-Men who just rolled in. One of these T's treated 31 lawns today (over 750,000 square feet).