My slim should be arriving any day now. This is my first adjustable so I was curious as to how all of you use your slim, fatboys, etc. Did you just experiment until you found the right number and then leave it there? Or do you adjust in between passes? Previously I have used a red tip and HD. The red tip is great and very smooth but not quite aggressive enough for me. The HD is a just a little better as far as aggressiveness for me but not as smooth as the red tip. I use blue birds, iridiums, and gillette yellows. I was planning on trying the slim on 4 to start but have not decided on adjustments between passes.