As always backup Orig aircraft.cfg before changing entries copy and paste over:

This will get ATC to identify right type and model:
[General]
atc_type=Piper
atc_model=NAVAJO
editable=1 //0

Well balanced aircraft with extra back seats "moment arms" from FAA and old company load sheet, use wing lockers if desired, adjust fuel to suit, aircraft has a great max ramp weight:

[weight_and_balance]
station_load.0 =   190,  1.5, -1.8, 0
station_load.1 =   190,  1.5,  1.8, 0
station_load.2 =   170, -2.45,-1.8, 0
station_load.3 =   170, -2.45, 1.8, 0
station_load.4 =   170, -5.0, -1.8, 0
station_load.5 =   170, -5.0,  1.8, 0
station_load.6 =   150,  7.9,  0, 0
station_load.7 =   200, -9.8,  0, 0
station_load.8 =   170, -8.1, -1.8, 0
station_load.9 =   170, -7.8,  1.8, 0
station_load.10=     0, -2.55,-5.0, 0.2
station_load.11 =    0, -2.55, 5.0, 0.2

station_name.0 = "pilot"
station_name.1 = "copilot"
station_name.2 = "Pax R1L"
station_name.3 = "Pax R1R"
station_name.4 = "Pax R2L"
station_name.5 = "Pax R2R"
station_name.6 = "BagFwd Max150"
station_name.7 = "BagAft Max200"
station_name.8 = "Pax R3L"
station_name.9 = "Pax R4R"
station_name.10= "WingL Max150"
station_name.11= "WingR Max150"

Better rudder control, use A2A Accufeel to soften suspension if desired:
[flight_tuning]
rudder_effectiveness        =0.5 //1.0

Smoother taxy but watch your landing speeds closely as in real aircraft
[brakes]
toe_brakes_scale=            0.4 //0.7

[Flaps.0]
flaps-position.1    = 15 //20
flaps-position.2    = 25 //30
 

Nice work!  Perhaps one day Carenado will stretch the Navajo and make a Chieftain.

Thank you for these additional tweaks, TT. They seem to work nicely.  I prefer the original load stations, however, as I only fly with a copilot and no pax or bags.

 

Stew

Why the changes on the flaps? @TerribleT

[Flaps.0]

flaps-position.1 = 15 //20

flaps-position.2 = 25 //30