Mossy,
I have no doubt that you will be glad you bought that Fimco sprayer. I used to think that a backpack was big league but, after going through four or five tanks in a day, I now use at least a 25 gal sprayer. I also have 60 and 100 gal units but those are for busy days. Aside from all the walking, my shoulder's "itis's" don't like the straps. And I don't have any problem with squeezing the handle and riding.
I have had the opportunity to side-by-side with almost every over the counter product out there. I have also used restricted products. Bought a bottle for nutgrass in zoysia that will also kill the rhizomes and nutlets. Six ounces was $123.00. Each has it's pros and cons.
Welshman, don't condemn glyphosate for taking longer than Spectracide; I never see results in less than a week. The process is somewhat like starving the plants to death and that takes time. If you want quick, get some Diquat. Spray it by lunch, you'll see wilting by supper. But you will get re -growth in a week or two. Personally, I like to spike the glyphosate with about 1/4 dose of Diquat. You see some yellowing and wilting in a couple of days but you get the gly' kill. I do that so I can see spots I may have missed or that a popup shower may have diluted. I have sprayed glyphosate on privet in the fall and not seen results for a couple of months. And FYI, employer is paying for the gly so I use all I want and mix it plenty strong. On the other hand, a weak spray seems like job security.:thumbsup:
So: glyphosate, diquat, 2,4-D, imaziquin, triclopyr, sethoxydim, fluazifop, etc. all have their uses. READ THE LABEL!
Good luck.