I need a fishfinder to fish a chubby properly. If I am fishing for walleyes, I employ three different techniques. I'm going to go in order of aggressiveness.
The first is to fish it 4 feet of the bottom, and just do a 1' lift, and let it drop on slack line...if the eyes are aggressive, they will just come up and smack it.
the second technique is to fish it about 1 foot off the bottom, do a lift/drop sequence. When the fish come up to inspect it, I lift the lure slowly, and they will take it (sometimes extremely lightly, sometimes they will follow it up some distance before they take it).
The third technique involves fishing the lure a few inches off the bottom. I work the lure with very light upward twitches, and pay alot of attention to both the vex and rod tip. Usually i can just barely see the lure on the vex, and fish will show up as a flash under the lure. The take is imperceptible, I only know they are on there when I go to twitch it up, and there is either no weight, or more weight then there should be.
A side note is that while fish don't seem to show much color preference, they will show a huge size preference, whereas they will take one size and not take another...to the point of not catching fish if you aren't using the proper size. Also, with the medium and small size, light line is really critical (6lb or less) so that the chubbies behave properly.