I started using them several years ago wading the streams locally. They are dynamite for bass, panfish and sometimes a cat will even bite one. I get mine at BPS. There are several different colors and some days one works better than the others. I have never figured a pattern for color choice so I just experiment every time until I find the one they like best that day. One way to use them is to get some of the Charlie Brewer slider heads, the flat ones. I got some 1/16 oz and they work great. The way the head works it helps the bait swim in a realistic manner when you do short jerk or pull retrieves. I also use the YUM craw scent on them. That seems to help.
The best day I have had with them I had a 3+ lb smallmouth, several more in the 1.5 to 2.5 lb range and a whole bunch of redeye (or rock bass) that went in the 1 lb range. On a 5 ft ultralite and 4 lb line it was a blast. I really don't know how many I caught that day but it was over 40. I don't keep any of the fish from the streams here because there is enough pressure that they could get fished out if you did. I carry the small rapala scale to weigh anything that looks good.
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A day late, a dollar short and two drinks behind.