It's not clear from the link I posted how they trip. Are they similar to the Tadpole, another device I've just recently become aware of? I'm thinking of trying one or the other, or maybe both, to catch lakers in 20-30 fow. I use Big O's a lot for bass, walleye, and pike. I don't know if they would trip the Seeker(they are a relatively shallow diver.)
http://www.offshoretackle.com/resettable_diving_weights.html