I just bought a used Explorer 2 complete with a pro coil AND a Sunray X-1 probe. I was told this machine has faster signal processing than the XS and after using it a few times I believe it. I'm getting good signals that are closer to iron. This is going to be a fun machine in 2014! Honestly the main reason I bought it was because it had a solid working X-1 probe on it which isn't being made anymore. I'm sending my old one to Ralph at Sunray now so it will work right when I need a backup.
Neal
Neal