I got some of my questions answered here:
It answered:
The old enclosure didn’t have holes for the USB or Ethernet.
The large holes haven’t changed and still in the same place (at least at the time of the video).
It didn’t answer what the stand off hardware is. I found this github announcement
https://github.com/rayshobby/opensprinkler/tree/master/OpenSprinkler%20Pi/hardware
and the github apparently has the layouts of the enclosure so I can modify it with cutouts. The google drive link there DOESN’T have the current board or standoff info in spite of the fact that it says it has all versions. It only has up to 1.2. I think the info is probably posted somewhere but very frustrating trying to find the various relevant info…