I am having a heck of a time completing "To D'Ni". To get the fourth CZMU Marker you have to either do a suicide jump off the cliff and click on the marker while falling or somehow you have to get so close to the edge that you can see the marker and click on it without going over. I have tried both ways and cannot spot any marker. What can I do to get the fourth CZMU Marker and wrap up this part of the game. Fretful Jim.