This person may be a good mechanic, but if you just ordered the unit and asked someone who hasn't been trained on the unit and doesn't know it's full features, to tune it, you are asking for trouble.
Pinging sounds like a tunning problem not a unit problem.
I would sooner consider the Power FC b4 the Fcon V simply because there are more people who know how to tune them. But i would still buy the wolf b4 either of these, due to the security feature and a few others. The only thing the wolf lacks is a knock sensor, but if it is properly tunned it is not required.
I personally am still behind the Wolf, as i have had no problems that weren't related to tunning. At the start i also had some delemas, but with further tunning these have been eliminated.
Nizmokid if you didn't screw me over earlier this year i would have put my map/tune on a disk and send it to you, to use as a base tune, then get your mechanic to trim the "edges" to suit your car.
You never know when something will come back and bite you on the A$$!