I like to fire some scent up the inside of the tube-more out of habit/confidence booster than anything else...if it works, keep going with it. I also tend to quite often use 4" tubes rigged Texas style ("Texposed") on a 4/0 hook-no extra weight. This works great for working heavy cover and can also be fished like a jerkbait (I call it a glide bait the way it moves) at weedlines, drop-offs and flats. One place where applying scent does come in handy is if you're going to fish the tube on a jig-the scent inside the tube makes it real easy to slide the jig head in.