There's no way of knowing until shortly after we plug the machines in at your event if they made it to your event in one piece. A speed bump, pothole or short stop can be all it takes for something important to a pachislo machine's normal operation to become misaligned, loose, or flat-out broken. What they were not designed for were to be jiggled back and forth in the back of a truck as they make their way from event to event. That's not so much a problem in Japan, where a machine gets unboxed, installed and stays put for months or years - as they were designed for.
Pachislo machines have very, very delicate electronics inside of them.