Creeping Charlie, oxalis, violets (tough), clover, knotweed, purslane, clover, spurge, etc. Been advised by some (here) to use "amine" formulations....problem = "amines" don't touch the above"?? Been using Chaser + LI700 with really nice results, so I'm wondering "What's up"??? Why the amine recommedations ?? Been told that "esters" penetrate the leaf tissue"?? Any results/opinnions out there??