Yes, with the d8's. I am using the stiff orange vorza springs up front and had the grays out back and it worked pretty dang good before.
I went to blues in back now which are one rate softer than orange, but much firmer than the grays were to get even frequency as well as moving shock positions a little. I had to move the upper front mounts in one hole and the rear lowers out one hole.
Before,when I ran firmer springs in back, it would kick and also nose down off jumps. hopefully now that I have the same pistons front and rear, the stiffer springs will work good this time....we'll see.