Weheka-
"Would you mind telling us in some detail as to why you are speculating that a C of G problem would be high on the list as a causative factor?
Do you have experience operating the 206 in the skydive (or other) roles?"
Have done a reasonable amount of time in skydive ops. C of G isn't too much of an issue in a 206. What can catch you out is not resetting the elevator trim following a landing with 1 up. The CG is near the forward limit 1 up requiring as much as full "Nose Up" trim for landing. If not reset before takeoff with a full load the control loads are very high - I know from first hand experience!