Like I said in my first post ever on this forum...I do not own a Scion, yet. I need to know in inches what's the distance between the two plastic pillar covers in the cargo area. I also need to know the distance in inches from wall to wall in the cargo area. I've looked on the internet and everyone lists the volume of the cargo area. I need dimensions. I want to start building my speaker box now. I want to be ready. Also if someone could tell me how high up I could go before I start infringing on the back window. Thanks!