I'm still trying to decipher your post Scott. You speak a language with which I am unfamiliar.
Now to PD's hunt. I'll probably be in the minority but here goes. First and foremost, glad that the animal was recovered. But I doubt that an animal of that size would be dropped like you said from a 46# bow shooting a 620gr arrow. It most likely was reacting so quickly to the shot that in it's haste to exit the scene lost its footing and stumbled in to the water tank. This is an assumption on my part so please don't take it as criticism. I have no doubt you saw it drop.
A beautiful animal and I'm genuinely envious of your being able to hunt the Dark Continent. Would love to do it some day but being well into the "autumn of my years", more like the "winter", that possibility is very remote. Do like to read these stories though.