Ok, I was in the Oak Brook "showroom" today and was looking at the White Model S on display there. I was showing a friend of mine how I had just discovered the bottomless pit this morning ... I had dropped something in the left "sink hole". Went to retrieve it later and it was gone but my hand seemed to go deeper and deeper into the abyss. Then I realize ... wow ... it connects to the foot area for the kids seats. I removed the cover to confirm and sure enough the entire area connects and both abyss, left and right connect. But. The Model S on display only had a left abyss. The right one was covered over. By what? What is my car missing? Sound upgrade. Performance. Is that what's hidden behind a wall there? Anyone know?