Perhaps they bit off more complexity than they could handle. Like I said, I am surprised they can even get four things wirelessly talking to each other at the same time, much less reliably. Sometimes XP tends to look at what they accomplished technologically and as engineers become enamored with their own technical accomplishment, not realizing that in the real world, you really need pretty much flawless performance. If the problem is too technologically complex to achieve that, then it may not be worth the trip. They tend to be engineers first, businessmen and detectorists second and they tend to miss that second part of the equation as they get caught up in the technology. That may be because XP's CEO is an engineer's engineer first and foremost and everything else seems to be secondary in priority but that has also resulted in an incredible detector with some cutting edge technology that some of the more established detector companies would tend to shy away from from a business risk standpoint (presuming they had the engineering talent to pull it off in the first place).
