I just got my AT PRO and put it together. First thing I noticed is I don't like the coil/headphone connector style. I understand the need for such a connector in an All Terrain detector but I had trouble installing the plugs (do to design and location) and they look like the pins are very susceptible to getting bent. I bought the 2 coil Spring deal but do not look forward to changing the coils very often. Has anyone had a problem with bent pins?