I'm glad I asked, too! Thanks for the detailed response and the great photos.
I really like that the platform has multiple cut-outs to make use of the floor storage. I still have multiple family and friend passengers, so I'm not going to be able to pull the third row like you've done, but the idea is inspiring all the same. I also don't have previous holes to use, so I'm probably going to through-bolt the piece after drilling holes near where the jack rests. Any worries about the relief holes you've drilled for the bolt heads significantly reducing pull-through strength?
I also really like the way you've done the raised drawer slide for jack access, but in order to save weight, I'm going to see how I like living without drawers and just using containers in that space. Just thinking about lift-out covers for the jack space and the others for now.
Again, fantastic write-up so far, and much appreciated.