Near Future Laboratory's "Scale" is an experiment in solenoids, cheating and getting power output just right.
Not knowing a heck of a lot about solenoids in practice – I know what they do, and, as an example of the sometimes impracticality of higher-ed, am fairly fluent in the E&M principles at work here. But, when it comes to the practical matter of finding one with the necessary “umph” to articulate a simple controller’s buttons, it’s all guess work.
The first attempt, using cheap $2 solenoids, couldn't even depress the buttons. The final setup works, NFL reports, but is "less umph-y" than one 24 volt set previously experimented with.