Use `set` not `add` after the delete
Use `set` not `add` after the delete

We want the `add` action to be _synchronous_. That means that if the
action fails anywhere we consider it a failure.

Afterwards, we want to do an _asynchronous_ `set` action. It is okay if
some hosts do not recieve the set, they will consistently get the prior
delete.

iFixit/Matryoshka