By saying hollow back I ment that (no matter how hard I try) usually my butt is the first to reach the ground in a basckside turn.
I was asking you, because looking at the pics (which are great) I saw that you have a similar body position (2nd picture).
Patrice and Jacques has a much more straight body in the backsides. I think it comes down to the fact that I have to practice more
Cheers,
István