Has anyone installed a 2nd pump (Shurflo) on their Perma Green ride-on??? We have tried "everything in the book" in order to create more spray volume on our PG units, but with very minimal results. Currently, we kill dandelions, but that's about it. Our problem is small-leafed weeds such as clover, chickweed, ground ivy, violets, speedwell, spurge, purslane, knotweed, etc. Our Perma Green units cannot kill them. Heck, even Rugel's plantain is iffy. Now I am considering using TWO Shurflo pumps on each unit??? Here's the nuts & bolts: We can obviously see the "spittiing" of liquid on dry concrete with out PG units. It shows one-inch spots of dry concrete (no "complete coverage"). I know it does not take a rocket scientist to figure this out. Heck- even the "labels" call for 'complete coverage'. I have talked to the Perma Green guys. They "empathize" with me, as they have no solution, and they see a need for improvement. Reading between the lines....I truly beleive that even Perma Green acknowledges the lack of weed control problem. Any suggestions? (if you intend to scold me for what my results have been, please do not bother, cuz I know what I hear from my customers). Bottom line: I need to know if my PG units are worth Ni__er-rigging to make them kill weeds (two pumps). Otherwise........I'm gunna dump 'em and go for something else. rscvp, Thanks very much.