Hi Miko,
I've had a bit of a play with the WEIGHT & BALANCE section and these figures work fine on my set-up so give them a try... just copy this section (between the lines of dashes) and paste it into your aircraft cfg file overwriting the existing WEIGHT AND BALANCE section:-
//-------------------------------------------------------------------------------------------------------------
[WEIGHT_AND_BALANCE]
reference_datum_position=000, 0, 6.800
empty_weight_CG_position=000, 0.000, -8.000
max_number_of_stations=50
station_load.0 = "170.0, 45.0, -1.5, 0.0, Pilot"
station_load.1 = "170.0, 45.0, 1.5, 0.0, First Officer"
station_load.2 = "150.0, 40.0, -1.0, 0.0, Flight Attendant"
station_load.3 = "3570.0, 35.0, 0.0,0.0, 21 Pax front"
station_load.4 = "3570.0,-25.0, 0.0,0.0, 21 Pax rear"
station_load.5 = "1500.0,-30.0, 0.0, 0.0, Baggage"
empty_weight=24802.000
empty_weight_roll_MOI=260000.000
empty_weight_pitch_MOI=302000.000
empty_weight_yaw_MOI=470000.000
empty_weight_coupled_MOI=1400.000
max_gross_weight=41005.000
CG_forward_limit=0.000
CG_aft_limit=1.000
//-------------------------------------------------------------------------------------------------------------
As regards the 10 degree heading/course changes I think this is an FSUIPC thing and can't be easily fixed. That said sometimes when I click these knobs really close to the centre I get 1 degree changes but it doesn't always work...
Hope this helps !