Problem 1: we recently "hotwired" one of our PG ride-ons (recommended by Permagreen), but when we slow down the rpm's (to turn the unit or to go slow over a heavy weed patch) the spray dwindles down to "not much" (poor weed coverage). ie: it barely spits out. (good luck on small-leafed weeds). Problem 2: "the weeds along the edges" --- they ain't dying (knotweed, oxalis, clover, spurge, purslane, etc). We mix the herbicide at the highest rate, but still poor weed control along the edges. On every lawn. No problem = when we push spread the dry fert & backpack spray the weeds OR.....use our LESCO Ztwo sprayer/spreader (works great & super weed control). So I've not been really happy the past 4 years with our Permagreen Ultras, cuz small-leafed weeds do not die. We have a problem as we have "lost customers" when we relied upon our Permagreen units. Anybody else experience this? Thanks - rscvp.