Hi Guys when the 4k came out we bought one and got a few months under our belt detecting in FNQ. we sold it due to work commitments before it got to much age on it lol. my question is this we are about to travel oz again for the third time and well is it worth the upgrade to latest greatest minelab or should i stick with what i know? as all i remember was it was a massive learning curve at the time and we sure did dig deep for those boot tacks on the Palmer River. any help would be great cheers