I've been making my PGR strategy for next year and considering mixing Roundup at.25 oz per gal and Primo Maxx at .25-.50 oz/gal. Maybe even mixing in some iron to offset discoloration from the Roundup. Of course I'd try it on my lawn first. Might be a more economical way to utilize PGR's and offset Primo's high price. Any opinions? Tremor?