[dnanian]

There are various posts on the forum that explain how to write a little shell script to eject the drive post-copy, so you might want to search around a bit.

In scenario 2, though, you should be able to select the (already created) image file in the "Disk Image..." pop-up and we'll unmount it (though not the intermediate network volume) when we're done. Just select it even though it's grayed out, and ignore the 'overwrite' warning.