Great info Steve,
I was not aware of a 'sliding sled', that definelty creates a unique look. I will also trust your strength analysis report. As the joinery is hidden it leaves doubts but a fantastic 'look'.
The newly posted image is very nice, no plywood appearance at all. If by chance you sell online, I'd be sure to use this closer view and the great discription you gave on it's strength.
I'm also pleased you took my comments so positively. They were meant to improve your presentation, not knock your workmanship.