I just installed one of these in my Data East Star Wars. WOW!!! I had never heard of this mod until a month ago when I stumbled across this thread. So glad I did!!! The game just has a whole different layer of polish...the relay clicking is gone, the harsh strobing effect is gone, the subtle slow rise and fall effect of the backbox are fantastic. This thing will go in every Data East game that comes through my door moving forward, that's for sure! Amazing mod...subtle but VERY impactful. It takes one of the biggest complaints about DE games and totally makes it a moot point.