I am in the market for the Prodigy and was just wondering if there are different version numbers? I found a good deal on one and the ad says it is version #2.4 Is this the latest? I have noticed some say they are for 2-4 axles or 2-8 axles, I believe the only difference is the wiring am I wrong about this? I need to make my purchase before 12/11/03 and just want to make sure I purchase the correct/latest version. I have no future plans on pulling anything with over 4 axles and think I would be ok 2-4 axle version, if indeed there is no more than just different wiring involved.