THIS is a great strap that ticked all my boxes, and I really love it.
http://luma-labs.com/products/cincha.) It attaches to the camera in
TWO places/points for strength; one strap loop and one tripod mount, so all the pressure is not on one single point
b.) Because it attaches at 2 points, there is
none of the "TWIRLING"[/u] you get with a single-point mounted strap
c.) This "CINCH" actually does cinch up or out. Tug down on the little grip and the strap
shortens up and lies solidly against your underarm or back or front for walking. Tug up on it, and it
lengthens out for shooting.
d.) You don't need to attach to the tripod collar. You can use the tripod threads on the camera itself, because it is only 1 of the 2 attachment points and the weight is nicely distributed between the two.
e.) The shoulder pad is very comfortable.