I do it for the salmon river steelhead. I'll make the back of the stone black, and then do a few wraps of Estaz, 2-3 depending on the size of the hook for the thorax. Then pull the wing case over it. Quick and easy tie that catches fish.
Jim Rusher's Estaz stone is a big staple on the Salmon River.
Years ago i used to tie all estaz black stone on a Alec Jackson 1.5 hook.It was outrageous, an believe it or not it caught fish...never saw a stone that big in my river samples, but it was just hilarious when the Salmon or Steelhead smashed them..
rootbeer estaz with gold wingcase has been a good pattern for me. I use large diameter black ultrawire for the abdomen to give the pattern some segmenatation and weight. I also experiment with different color beads...orange, red, black and copper have all produced.