I'm not convinced of the yield hit from off label glyphosate. From what I've seen, the late or high rate of Rup will delay the crop substantially, but it is the rest of the growing season that affects yeild. If you are in an area where moisture is short and heat excessive from here on out, then it would definitely hurt yeild. In my case, we rarely get enough heat to hurt yields, and moisture is rarely limiting. 2 yrs ago I sprayed parts of a field at early flowering. It was hot and dry for a couple of weeks afterwards(unusual), and it fell way behind the unsprayed crop. Then the weather went back to cool and wet as the injured crop was entering full flower, meanwhile, the unsprayed gave up on flowering during the hot weather and was done before the rain came back. Big difference in yield.