The RSK's don't?
I've noticed both my car and Tristan's don't have the lumbar adjustment lever because its visibly been removed, hence the holes in our upholstery...
Due to the pressure needed to adjust the lumbar support and the lever being plastic, its a disaster waiting to happen. My lever was there, but had no teeth left to adjust the lumbar support on my LX.
On the standard GT seats though, it worked a treat and the lumber support was fantastic.
JDM > AUDM.