Here's a closer look at the tweeter pod assembly. It comes apart into 2 pieces.
The Sony mid mounted to the door:
The stock mounting ring. I did not re-use it.
The Scosche mounting ring I used:
JL provided a cardboard ring I used to trace along the inside so I could cut out the mounting hole for the new JL 6.5 mid.
Here's the ring after I enlarged the mounting hole: