Sir_G
I agree that a Dom/Domme must be constantly alert in all we do with our sub/slaves but I think that any form of suspension requires knowledge and awareness in great amounts then normal.
Here is a pic that is a superimposed shot, if you look carefully she is standing on a floor that is missing. The face give it away no signs of discomfort that minimal weight bearing on arms and shoulders would show. If you do suspension my advice is to offer lots of points of support, to carry the body weight. Same with the second one
Russell