Finally had some time to install my pin stadium kit in my Batman66 today. Very happy with the improvement. I have the GI module with the UV flasher options. I hooked the flasher circuit to the pop bumper playfield flasher.
The biggest improvement is how much brighter it looks in the upper playfield area in front of the turntable. That area is just too dark with the stock factory lighting.
The GI module also makes for a much more dramtic start to each game due to the bigger difference in light between all GI on vs off. In attract mode everything is on all nice and bright. Then when you start a game the GI goes totally dark (along with pin stadium if you have GI module option). The Batman intro jingle plays and the Batsignal is lit on the back panel as Commisioner Gordon calls the dynamic duo into service. If you installed the mini playfield Batsignal that lights up at this time as well.Then after the intro jingle finishes everything lights back up and you start the game, very cool. Here are my before and after pics.