So I got another nuby orange virtual gun off eBay... It won't work either. Same as my other one. Start button works but nothing else and I can confirm that these all are US guns and the original Stunner worked back when I originally bought it new.
Could it be because when I modded the Saturn I messed something up. I soldered the two connectors on the chip instead of adding wires. Could that be it? I mean 3 guns and same result... It has to be something with the Saturn right?
Does the signal cable from the modchip matter:
You can get rid of the signal cable altogether and link the signal point to point B with a bit of solder instead of linking to pin 14 of the 32-pin chip.
-from the RacketBoy modchip installation guide