Vortrekker, if you want some ideas for double shoulder slings, here are some; I spend my winters with various rifles on my back, skiing, and have rigged up a number of sling setups that work well. The cheekpiece might give you a little trouble in placement to avoid damage from the sling hardware/sling, so you'll have to be careful in laying that out. I made an adapter that works with a standard front stud, also.

They work, too.