I did the original physics of the VRX mod for rfactor (which I guess it's used by this model): this car looks great, maybe you could just make the front and rear track a little wider, this looks good to me.
Also, it would be nice to have a passenger in the seat for ridealongs and the possibility to remove it to have a race day spec.
@Robin_NL 4wd sucks with realfeel plugin, disable it with ctrl+2(keypad)
Not really into rallycross any more (since they started using disguised F1 cars), but I tried the little Polo and I really like throwing it around. Sound is good (though I have no idea how it sounds IRL), FFB feels OK to me, looks are fine, all in all great job !
Kudos to you. Thanks.