Hmm. I wrote an inline line of what I thought was pure code, and the editor treated it like html. The last sentence should read:

So a macro that turns a 921 on, for example, should read:
Execute some bogus command that works when the unit is either on or off but leaves the unit in an "On" state
Undo the side effect of the bogus command, leaving the unit in an "On" state
Go about your business