Not much, I did not have mood for it, as it is quite difficult. It is not abandoned, just I am not in a hurry
However, despite there is nothing to show, there is a little progress. I have found a way, how to fake normal mapping of interior vents without some overcomplicated geometry. Also found a technical drawing of an interior for a more detailed rework. The IRL car undergone some major repairs, which changed IRL physics a little. The mod will need a different setup (especially the rear axle). Still not happy with an approximation of the rear axle.