I'm sorry I left a component out. I attach my weight 6' ahead of my lure with a rubber band. That way I just leave the weight on the line no need to stop reeling and take a snap weight off. I learned this system from Jim Stedke who I consider to be one of the better crankbait fishermen on Lake Erie. As previously stated speed and direction of travel all play a part in depth. Waves will also play a part as the planer board surges in the waves the bait will move up and down in the water column I think that helps trigger bites. Weighted systems have a lot variables so you can never be 100% accurate.