These are the relevant changes I made to the original. I assumed this aircraft had no steerable tail wheel so it is now rudder steered on the ground too. Just copy/paste them over their counterparts and have fun.
;Moments of Inertia
empty_weight_pitch_MOI=1446.000
empty_weight_roll_MOI=1000.000
empty_weight_yaw_MOI=4167.000
empty_weight_coupled_MOI=0.000
CG_forward_limit=0.000
CG_aft_limit=1.000
[flight_tuning]
cruise_lift_scalar=1.000
parasite_drag_scalar=1.600
induced_drag_scalar=1.100
elevator_effectiveness=1.200
aileron_effectiveness=1.200
rudder_effectiveness=0.100
pitch_stability=1.000
roll_stability=0.700
yaw_stability=1.200
elevator_trim_effectiveness=1.000
aileron_trim_effectiveness=1.000
rudder_trim_effectiveness=1.000
[propeller]
thrust_scalar=0.900
[contact_points]
point.0=1, -13.00, 0.00, -2.05, 1181, 0, 0.03, 180, 0.30, 2.50, 0.69, 0.00, 0.000, 0.000, 0.000, 0.000
point.1=1, 2.00, -2.60, -5.30, 1574, 1, 0.41, 0, 0.40, 2.50, 0.78, 0.00, 0.000, 2.000, 0.000, 0.000
point.2=1, 2.00, 2.60, -5.30, 1574, 2, 0.41, 0, 0.40, 2.50, 0.78, 0.00, 0.000, 3.000, 0.000, 0.000
static_pitch=12.700
static_cg_height=4.500
[brakes]
toe_brakes_scale=0.40
parking_brake=1