I installed Tongass Fjords X using online guidelines and it works great alongside the neighboring regions of ORBX too. Flying the MILVIZ Beaver with tundra tires parked at PAFE (Kake) I notice that when I switched to the outside view and panned around it suddenly froze and CTD (crashed to disk). I also had CTD when I flew over Kake. This happened twice in each case when I double-checked to see if it would repeat itself. When I approached Kake from Hydaburg (HYD) and landed this did not happen; but I stayed in the interior view on final. Outside of Tongass Fjords X with this aircraft I have had no CTDs. I have not added anything yet from Misty Moorings to see if I get a CTD also, but I wanted to add to the experience base for P3D v4.