Is this one a glorified Ace 250? Does anyone know if the Ace 250 coils will inter-change with the AT PRO? Guessing the connectors are different? And maybe frequencies but just thought I'd ask you users these questions. Most of us have tried every detector on the market. They all have pros and cons, I have one coming Tuesday from one of our sponcers and was curious what some of you could relate about this AT PRO. Thanks KCK