Bally EM's are the game they are, they cannot be changed. I have several Bally EM's, as well as an E1000. The newer machines are able to have their games changed out, it's just a matter of reel strips, some glass, maybe a topper, and the ROM's. That said, Bally EM's, while similar to EM pins inside, are a whole different world. I've been working on them for a couple years now and still learn new things about them all the time. Parts aren't impossible to come by, though some take searching for now. The Bally's seem to be gaining collectibility now as well. Also be aware of gaming laws in your state, some do not allow private ownership, others stipulate the machine must be of a certain age ie. 25 years old.