Attach the strap to the tripod mount with the screw from a crap tripod head or everready case and one strap lug. It will hang vertically a la M5. Works for me.
Serving excellence again, our RS-4 Classic Retro is an updated version of the BlackRapid Original Camera Sling! Yes, it is back with its small zippered pocket to carry extras. The original “RS-4” was the first camera sling strap to “Turn The Camera World Upside Down” back when we started in...
www.blackrapid.com
Probably Definitely my favorite strap for 'eye level' camera use.