I managed to snag one of the Helix 10 G2N graphs from my local Cabelas, but it seems to be an unusual versioin. It is model 411270-1 HELIX 10 HW MSI GPS G2N with XM 9 H1012 HW MSI T for the transducer. What is different from the regular Helix 10 MSI G2N? Is this a downgraded version for Cabelas/BPS? Don't want to regret buying a sale unit that is not as good as a standard unit. Also is AD MTM HW MSI the correct trolling motor adapter? Is this transducer shielded or would I need trolling motor specific transducer? Thanks for any help you can give me.