Had not planned on adding a screwlok. I'm not fond of them; because, I find them difficult to "center" in the worm.
However, I borrowed a weighted, swimbait hook from a friend of mine, recently; and, the screwlok device actually incorporated a "centering" pin that was nothing more than an extension of the screwlok that protruded beyond the coils and could be stuck into the center of the worm, swimbait, etc. prior to threading the bait on to the screwlok. Have you seen these? If so, where could I purchase them?