I still have to install the topper and RGB upgrade kit, but another thing that caught my attention are the 3 lights inside the 3 pop bumpers. I've seen a couple of YouTube videos of native RE's, and these bumper lights are also changing color just like the rest of the RGB GI.
When you read through the RGB upgrade kit manual, you're basically only working under the playfield to replace the GI lights and inside the backbox to install some PCB. Nowhere have I read that you also have to replace the 3 lights inside the pop bumpers for RGB lights (this can only be done from the top side). The only thing that's mentioned in that manual is that you have to cut the 3 grey and white wires coming from the pop bumpers, twist them together with some lamp cable that's provided with the kit, and then they magically change color??
Again, I haven't installed the RGB upgrade kit yet, so I can't check it yet, but I've been wondering about those bumper lights.