(Sorry for the previous top posting.)

One issue that I cannot seem to solve by myself is getting the
`org-babel-tangle-sync-mode' to persist on the `after-save-hook'
after it's been activated.  My understanding of this hook is
that it is global and persists across buffers, but I'm seeing
some inconsistent behaviour that requires me to toggle the mode
on and off again.

Is there something I'm missing?