Sixdogs, glad you found something that worked for you. I don't know anything about the stuff you found
Yes actually I did research this product I believe you missed the link titled "Certainty for Warm Season Tall Fescue"
I don't want any one to be misled by your post stating that it does not work on fescue.
Text within the PDF
"Selective Control of Tall Fescue in Warm-season Turfgrass Sites Background Productive and functional warm season turfgrass requires management to maintain desired turf quality. Often, undesirable weed species invade and become established, crowding out the desired grasses and degrading turf quality. Tall Fescue growth in warm-season grasses often results in large unsightly clumps in irrigated golf course and highly managed residential turf sites. This guide is intended to offer background information and useful guidelines to consider when using Certainty® turf herbicide as an aid to selectively remove or suppress tall fescue infestations in warm season turfgrass. Considerations for Using Certainty for Tall Fescue Control Sites of Application • Certainty may be applied to the following warm-season turfgrasses: o Bermudagrass (common or hybrid) o Bahiagrass o Buffalograss o Centipedegrass o Kikuyugrass o St. Augustinegrass o Seashore paspalum o Zoysiagrass • This product may be used for general weed control on highly managed turf and native grasses. This product may be applied to residential and commercial turf sites, including apartment complexes, athletic fields, cemeteries, golf course fairways, golf course roughs, golf course tees, and other golf course areas, hotel properties, office complexes, parks, public turf areas, retail sites, storage facilities, school grounds, sod and turfgrass seed farms, and other highly managed turfgrass sites. Do not apply directly to or within 4 feet of golf course putting greens. "