I think I remember someone modding their tipx to be full auto, but as I'm sure you've figured out already, there is no room inside the TipX for it and thusley the mod required external pieces and it wasn't a one day easy job. And that kit posted above is nice. If you like that check out Milsig's FXR kit. It is built for the TipX and T8.
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If you wanted to go with the SMG look that majgi has, you could put the electronics and battery in the front grip, then run a few wires into the frame with a spyder/tippman solenoid and trigger switch in the trigger frame.
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I think you guys could make a setup similar to some of the airsoft guns where you guys could have the same setup as majgi's hera arms kit and run the battery and electronics through into the stock, the only problem with that though is that it would changing make firing modes difficult