To increase the movement in the tail of your swimbait and give it a more enticing action for bass, you can try several techniques:
Tail Modification: As Mike Iaconelli suggests, you can modify a traditional paddle tail swimbait by cutting the tail at an angle, which can unlock more action. For example, make a cut from the base of the tail towards the top at an angle similar to 11 o'clock on a clock face.
Removing Flanges: Jacob Wheeler mentions that on some swimbaits, like the Largo Shad, there's a flange that connects the tail to the body. Removing this flange can increase the tail's free-swinging action, which might be particularly useful in dirtier water where extra vibration can help bass locate the bait.
Dyeing the Tail: Adding some chartreuse dye to the tail of your swimbait can not only change the color to better mimic prey like bluegill but also sometimes alters the texture of the plastic, potentially enhancing the tail's movement.
Carving the Tail: If you want to increase the tail's action when fishing your swimbait weightless or at a faster retrieve, you can carve out some of the plastic around the tail to make it smaller, as suggested in the BassResource video. This can make the tail wiggle faster and allow for quicker retrieves without adding weight.
Practice and Observation: Study the movement of the prey fish you're trying to mimic and practice in a swimming pool or clear water to see how your swimbait moves. Adjust your retrieve speed and rod movements to create a more natural, erratic action that bass find irresistible.
Remember, the key is to mimic the natural movements of the baitfish as closely as possible. By experimenting with these modifications and techniques, you can find the perfect action that triggers more strikes from bass.