One of the lenses I use with my D800 is the 70-200/2.8. For extended shooting, it's about the biggest lens I can comfortably hand-hold with the D800. I also have the MD-12 grip mounted on the camera.
The strap I'm using is one of the Black Rapid straps that goes across your chest, which I love.
The nice thing about this strap (and I'm sure many similar straps) is the quick connect/disconnect ring.
My question is about the lens, which has its own tripod mounting point. Should I be mounting my strap on the lens or on the MD-12 grip?
When I change lenses, I go down to a 24-70/2.8 or a 50/1.8, neither of which have their own tripod mounting point.
If I mount to the 70-200 lens, lens changing becomes much more complicated because I also have to switch the strap back and forth between the lens and the camera. But the last thing I want to do is any damage to the camera body lens mount.
I shoot a lot of music, bands on stage, so quick lens changes are important.