Hey Scruff, Trying to do something really simple: Just move the tower view at KBOS to its correct location. So, here's what I did ... please tell me if I missed something: 1) Opened the default airport 2) Moved the tower 3) Saved the changed airport 4) Compiled the changed airport 5) Placed he newly compiled .bgl file in \addon scenery folder of FSX 6) Started FSX I expected to see FSX rebuild its scenery indexes? It did not. I expected the tower view to have moved (I moved it significantly, so would notice if it was using the newly compiled airport). Am I missing a step?