The manual for the TD says it goes to the foot for ‘max depth mode’. If that’s not true, this will be a bust. Nearest five feet is not adequate to develop a dive curve. I found discussion in another site where a guy doing the same thing I intend to do found it to be nearly neutrally buoyant when trolled. I think it dove to 5 feet 100 back. I’m counting on that being true. It is a 2.7 oz plastic device and is not as dense as a lead weight. I actually expect it’s drag to pull stuff higher, not deeper. We’ll see. If that manual is not correct about reading max depth to the nearest foot, I’m going to be upset