Umberto, I do believe now that you had originally positioned the refuel point for the B763 to 15.79 -3.55 4.27
I'm not sure what a 767-300 has to do with this...
GSX is not "subtracting" anything. The coordinates in the GSX.CFG file might not be what you expect them to be, because they are NOT based on ground, they are based on the airplane center of balance!! So, a 0 doesn't mean "on ground", it means somewhere in the belly of the airplane.
The coordinates are stored like as relative heights to the center of the airplane so they will always be valid, regardless how the actual load of the plane (which affects the plane height) were when you edit it. Since the plane is momentarily placed in Slew mode when editing, it's height will always be the same. Of course, when you *use* the plane, the height used will be the actual one so, with coordinates being relative, it will always work.
The editor, instead, will ADD to the relative coordinates, the plane actual height, so what you see in the editor, is what you expect to see (relative to ground), which IS different from what you see in the GSX.CFG.
So, I can only repeat and confirm, there's NO problem whatsoever with both the refueling and the 747, and the GSX.CFG file I posted is correct. The only possible explanation for not working, is that you haven't set it in the correct folder. There are many variants of the 747, so you must place it in each and every folder.
And of course, DO NOT forget the priority rules AND the UAC-compliant read/write rules:
- If you place it in the main Airplane folder under FSX\Simobjects\Airplanes\AIRPLANE_NAME, this will take precedence over the internal GSX data
- If you place it in the folder with the airplane name, under %APPDATA%\Virtuali\GSX\AIRPLANE_NAME it will take precedence over BOTH the internal GSX data AND a GSX.CFG file in the FSX\Simobjects\Airplanes\AIRPLANE_NAME
- If you place it in the main Airplane folder under FSX\Simobjects\Airplanes\AIRPLANE_NAME, but you then EDIT IT with the GSX airplane editor, a NEW GSX.CFG will be created under %APPDATA%\Virtuali\GSX\AIRPLANE_NAME, and THIS new file will also take precedence over it. This in order to comply with Windows UAC rules, that don't allow applications to write any settings under the C:\Program Files folder.
So, be sure you are not being confused about all this issues. Yes, I know it's best I'll add the 747 directly to the GSX internal database...