I’ve heard Brandon Palaniuk talking about this one briefly. He found that adding Neko weights to a larger swimbait, like a Huddleston for instance, allows you to strategically weight a bait anywhere you want it and gradually effect the rate of fall (ROF). ROF is extremely important in the swimbait world and refers to the rate at which a swimbait falls.
Since these large swimbaits are used to target suspended fish, knowing the ROF allows an angler to count the bait down. If you have an ROF of 5, the bait will fall 5 feet in 10 seconds. A bait with an ROF of 12 means the bait will fall 12 feet in 10 seconds.
Most baits come in only a few ROF options. So using Neko weights, you can really fine tune your bait to fall at a very specific speed. And by strategically placing the Neko weights, you can keep your bait more horizontal on the fall and retrieve so it looks more realistic.
You’ll also find at times that some swimbaits will tilt to one side or the other on the retrieve. This is due to a defect in the bait’s balance. The stock weights inside the bait have either been bent out of place or the bait was never perfectly balanced in the first place.
You can, however, tune a swimbait with Neko weights by adding them to the opposite side of the tilt. So if the bait is listing to the right, add a weight to the left side of the belly. This will pull the belly back down to that side and keep the nose to tail balance of the bait the same.