Greetings!As the title of the post says, I'm doing a clean install of my FSX and would appreciate advice on what order I should add GEX/FTX/UTX and REX. The last thing I added on my original install was FTX (NA Blue) and some of my airports had the appearance of being in a canyon (elevations were messed up). I did read that I should run the sim once before installing ANYTHING, and follow up with a defrag. Thanks for any advice.