I avoided clicking this title for hours, thinking it was something to do with the Twisted framework. Using "actuator" about software is uncommon of course, but

I avoided clicking this title for hours, thinking it was something to do with the Twisted framework. Using "actuator" about software is uncommon of course, but considering other terms in use in Twisted ("deferred" as a noun, "errback", "reactor" pattern) it didn't surprise me.