All herbicide labels call for "complete coverage" of weed foliage -- well....no Permagreen models (Centri/Ultra/ Magnum) offer this. Why? This is one of TWO substantial "downfalls" of Permagreen ride-ons. (the other is "fighting the gears" - why no hydro? like LESCO offers???) Okay - the Permagreen ride-ons kill dandelions, but they don't even touch small-leafed weeds like clover, knotweed, purslane, spurge, speedwell, chickweed, etc. Our first Permagreen ride-on was an Ultra (2003), and we NEVER used it for spraying (spreading fert only). In 2005, we finally installed a larger Shurflo pump (1.8 gpm/barely fit), and now we are seeing a little better weed control - not perfect, but improved. Still now, our Permagreen ride-ons produce a "spitting" of herbicide - still not complete coverage. I've communicated back & forth with Permagreen (God bless 'em cuz they try hard and are friendly), but they still ask the same questions: Are you mixing the correct amount of herbicide? Duh!!! I don't care what you put in the tank....you ain't gunna kill small-leafed weeds with a 'spit' on the leaf! We do not have any problem with weed control by spraying out of our hoses or by using our LESCO Ztwo spreader/sprayer. hmmmmmmm? Bottom line - anybody got answers? Thanks.