I saw your PS after responding to the previous. IMHO in a reverse bow you don't turn your back to the opponent, at least I don't. In this stance (or in fact it's more like a manouvre) I use the pivotting of my feet to drive my mass towards the opponent. My body turns slightly anti-clockwise (if used from a right neutral, like in CW), but not so much that my back will be towards the opponent. In the process my right schoulder (and thus the arm and the weapon) move closer to the opponent too.
After impact, if I decide that I'm done, I cross out while still facing the opponent. In an ideal situation I never exit with my back towards the opponent. This might ofcourse be different if there are other factors that urge me to face away from the initial opponent.
Marcel
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Marcel de Jong, 4th Black from the Netherlands