Slugfest is the most desirable of all the [email protected]
games and LEDs will take the load off your driver board and GI connectors.
There are jumper mods that should be done on the driver but they are not needed if you convert to LEDs.
You will want to get the batteries off the CPU by converting to an off board battery holder, when they leak they will ruin the board and it is made of unobtainium.
They should be replaced once a year so check it for corrosion.
Battery holders are cheap, I put them in a plastic bag and don't worry about the batteries if they leak I just cut the wires, toss the whole holder and solder in another one.