Very good article on the deliberate sling position abelacres. I've been thinking of making a para cord rifle sling, and now i might just add a loop at the proper place on the sling. I tried it out in my home with an unloaded rifle and a leather sling and it greatly improved my steadiness. If I ever get around to making that sling, I'll post some pictures.
I learned the bladed-off stance as well. Does anyone have any preferences on tucking in the elbow of your trigger finger arm? or not?