As geeks, we get excited about phones that are 10 per cent faster than their competitors, and camera sensors that capture 20 per cent more light. That technological arms race is equally ferocious in the metal detector world, as crazy as that sounds, and avid hobbyists can spend serious money on new toys that they compare with their mates. Sometimes, though, it pays off -- like for one (anonymous) Aussie gold-digger that found a 4.1-kilo nugget in Victoria's Golden Triangle.