hello!
i have unfinished 1982 mod for rfactor(1) from historicsimracing.forumotion. so, there this upgrade works properly, look how they realised this in upgrade file:
UpgradeType="Model"
{
Instance="FWING"
UpgradeLevel="FA1C-001"
{
Description=""
GEN=<FWINGEXISTS>=""
GEN=<FWING1>=fa1_front_wing.gmt
GEN=<FWING2>=fa1_front_wing_collision.gmt
HDV=[GENERAL]
HDV=FeelerFrontLeft=(1.0687,0.3285,-1.1703)
HDV=FeelerFrontRight=(-1.0687,0.3285,-1.1703)
HDV=FeelerRearLeft=(1.0922,0.3636,1.7841)
HDV=FeelerRearRight=(-1.0922,0.3636,1.7841)
HDV=FeelerFront=(0.0000,0.1720,-2.0397)
HDV=FeelerRear=(0.0000,0.2889,2.0212)
HDV=FeelerLeft=(0.7397,0.3295,0.0000)
HDV=FeelerRight=(-0.7397,0.3295,0.0000)
HDV=FeelerTopFrontLeft=(0.7828,0.1876,-1.7958)
HDV=FeelerTopFrontRight=(-0.7828,0.1876,-1.7958)
HDV=FeelerTopRearLeft=(0.5784,0.8216,2.2591)
HDV=FeelerTopRearRight=(-0.5784,0.8216,2.2591)
HDV=FeelerBottom=(0.0000,0.1382,0.0000)
HDV=
HDV=[FRONTWING]
HDV=FWLiftSideways=(0.046)
HDV=
HDV=[BODYAERO]
HDV=BodyDragBase=(0.152)
HDV=
}
UpgradeLevel="FA1C-003"
{
Description=""
GEN=<FWINGEXISTS>="//"
GEN=<FWING1>=blank.gmt
GEN=<FWING2>=blank.gmt
HDV=[GENERAL]
HDV=FeelerFrontLeft=(1.0687,0.3285,-1.1703)
HDV=FeelerFrontRight=(-1.0687,0.3285,-1.1703)
HDV=FeelerRearLeft=(1.0922,0.3636,1.7841)
HDV=FeelerRearRight=(-1.0922,0.3636,1.7841)
HDV=FeelerFront=(0.0000,0.1720,-2.0397)
HDV=FeelerRear=(0.0000,0.2889,2.0212)
HDV=FeelerLeft=(0.7397,0.3295,0.0000)
HDV=FeelerRight=(-0.7397,0.3295,0.0000)
HDV=FeelerTopFrontLeft=(0.7828,0.1876,-1.7958)
HDV=FeelerTopFrontRight=(-0.7828,0.1876,-1.7958)
HDV=FeelerTopRearLeft=(0.5784,0.8216,2.2591)
HDV=FeelerTopRearRight=(-0.5784,0.8216,2.2591)
HDV=FeelerBottom=(0.0000,0.1382,0.0000)
HDV=
HDV=[FRONTWING]
HDV=FWRange=(0,0,0)
HDV=FWSetting=0
HDV=
}
i hope it will help you with this issue