I know there are probably a lot of things that determine how much weight to use when using a downrigger. But keeping this simple, for most medium size lakes ( not talking the Great Lakes or Tahoe here) going down to the 30-60' range, trolling @ 1 1/2 mph, how heavy of a weight? When I bought my downriggers the guy recommended 10 pounders. That worked well for Tahoe, but is 10 pounders needed for a calm lake, or does lake conditions even matter? I was reading an article where a guy was using 3 pounders. Thanks