Time to call the professionals for the concrete cutting.
The goal was to recycle all the concrete for other garden projects,
for that I needed consistent sized blocks.
I told him "Think of the driveway as a quarry."
It was so nice to have someone else working, but it only took him 4 hours..
Soon it was back to me prying up the slabs and digging out gravel,
and re-installing the leaf block retaining wall.
You can see one reuse of the concrete in the photo below.
Because there's no fastener or connection between the decorative blocks,
there is a backer block of concrete at each seam, set below grade up, snug against the paving.
There's no way these blocks are moving easily.