Payload Question

[CowlFlapsOpen]

nothing wrong with it at all. That is what it is there for. You can use it to put all your passengers on the horizontal stabilizer if you wish. If
you are trying to match the designer's definitions of the station positions you must obtain the z- and y values from the config file for the aircraft
along with the reference_datum location (and check the option that says something like "do not estimate CG").