Have you tried stranded wire?I have, but not for the past eight years or so. I made my own assist hooks for yo-yo jigs for yellowtail. But when using those lures, heavy Salas and Tady and such, for bluefin when they first started being fished for regularly, I learned that those bluefin have sharp small teeth and several chewed their way free from me. So going to heavier and more bite-resistant materials has been a good thing.
How did they attach the rubber band?Only on wahoo bombs. And I didn't think that they actually helped. But part of the fun of fishing is trying different ideas, just to see what happens. I was watching a tv show Saturday about tarpon fishing in Florida and they were using small pieces of rubber on the hook shank to keep the hook from going too far into the live bait and then digging the point into the bait as it swims. Hmmm . . . sardines have done that to me. So, I will look into giving that a try on my next trip.