Has anyone used the transducer that allows your downriggers to raise/lower as the depth changes on your Cannon Digi-Troll IV HS riggers? I was wondering if this causes excess drain on the battery, with extra wear-and-tear on the riggers. Also, you would be changing your rod tension as you went deeper/shallower. Not a big deal, but necessary. Is this a worth while investment, or a PITA feature?