Raising the center column *up* adversely affects stability. I think that is pretty self-evident.
But what about lowering the center column *down*? Down as extending below and in-between the legs of the tripod? Is that equally as unstable as raising it. Is there any stability concerns with hanging the camera below the lowered center column?
I will often flip the center column when I am taking pictures of low flowers. Is that a wise thing for me to do?
Wouldn't that lower the center of gravity of the entire apparatus... and much like hanging a sand bag on a hook on the column... it should have the same effect of adding stability. I say go for it.