how many downriggers?

[dratharman]

Thanks for the great insight guys I think I'm just gonna do what curt suggested and I will just run 3 that way I won't have to worry about one close to my trolling motor. What size balls do most off you guys run? And I noticed last year that sometimes my downriggers would make a humming sound as I was trolling is this bad if so how to solve the problem I imagine if I can hear it the fish can hear and probably feel the vibrations
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