Tripped over this the other night whilst looking for something else. Looks similar but not as nice as another forum members reverse step down design.
Click image for larger version.  Name: HTB1H_KlIVXXXXa_XXXXq6xXFXXXm.jpg  Views: 4469  Size: 114.0 KB  ID: 6474Click image for larger version.  Name: HTB1H84LIVXXXXXEaFXXq6xXFXXXF.jpg  Views: 4454  Size: 116.1 KB  ID: 6475Click image for larger version.  Name: HTB1lxmgIVXXXXXAXpXXq6xXFXXXm.jpg  Views: 4496  Size: 117.1 KB  ID: 6476