I don't either, BUT I use an Arca clamp with Peak Design anchors on it to attach my strap to the Arca foot on my lenses, so I'm glad my lenses have built in Arca plates. That's on my Olympus lenses. On my Nikon 500PF the foot I have on it has an Arca mount, but also a QD socket, so on it I use the QD.I'm glad my gear doesn't come with those releases because I hardly ever mount my lenses or cameras.