Your right QB, there is more to it than just tossing them in the sink. I fish them in my pool and tinker with them on the water as well. My wife thinks I'm crazy, but I think it helps me understand how to fish a new bait, what added weight does to a bait, and to visualize what my bait might be doing when I cant see it.
Most of my mega's are nose down and slow float in the pool too...its alot less than the 45 exhibited in the sink. I try to think in terms of depth first...then try to figure out what the bait is doing....rising, suspending, sinking....then take look at its attitude...nose down, horizontal, nose up.....I dont like jerkbaits that nose up for some reason.