I have fished live shrimp under a popping cork for years, and had moderate success. Have always used a cajun thunder type cork with a #4 treble hook, a 24 to 36 inch fluorocarbon leader, and a small split shot about 4" from the hook. Shrimp hooked under the horn. I recently saw some you tube videos that had the guys rigging a little different. Main difference being none of them used the split shot, and most used a #1 or 2 circle hook. I can see how it would affect the shrimp's ability to move about more freely without the split shot. The other main difference was using the old style weighted popping cork with the split in it, therefore being able to adjust the depth if necessary. I was always under the impression that the new style popping corks were better because of the noise they generate, and the split shot helped to keep the bait lower in the water. I know every one has their own preference, and I have had success with my way. If it ain't broke, don't fix it, right? Just curious on other methods and suggestions/comments on this. If it helps me catch more fish, I'm all ears.