Reading over this thread for future reference. I don't see any mention of aux lamp driver boards but, I'm assuming, if your Bally/Stern from this era has an aux. lamp driver board that would also need to be replaced as well if you're going the board route for using led's? If that's the case now we're talking almost two hundred bucks to put led's in your game. The hours of soldering don't seem so bad to me at that price point.