If Way Point A was in common use by SFH, would not crews know the coordinates or, at least, have them noted down? If so, knowing that they were planning to change to the next Waypoint x miles before Waypoint A, which they did, isn't the exact position for a VFR flight rather irrelevant?
Did Supertans have a facility for storing commonly used waypoints?
I still don't see how this argument helps to justify the certainty of those who claim gross negligence before waypoint change. I cannot understand the argument which denies that, having changed waypoints and therefore having lost all reference to Waypoint A, they did not intend to turn left. Nobody knows why they didn't.