I want to preface this by saying that I feel the Levitate is an amazing piece of engineering, and does some things better than this year's Mach 34 from PSE (faster, a little more maneuverable). However, the accessory package that Sam produced (adjustable cable guard system, TiTan cable slide, string stop and TAP draw stops) made my Levitate just a little bit better. Whatever remaining vibration/buzz from the factory build is gone (or diminished where I do not notice it anymore). There is a tremendous amount of energy transfer that happens when you release the shot on the Levitate, and even though the factory-built model did a great job of cancelling out the vibration and shock, there is a noticeable difference with the TAP accessory bundle on the Levitate. When I removed the factory cable slide and rollers, I noticed some fraying on the serving around the factory rollers on the cable slide; and I noticed that the teflon rollers on the TiTan roller guard do not have the same sharp edges as the factory rollers. The TAP kit just quiets down the shot cycle and smooths everything out when you release the arrow--I no longer notice the minimal jump I felt before when I release the shot. It might seem a shame that you're spending an additional $150 to upgrade a bow that cost $1850 when it came out last year, but I'm pretty darn happy with what I got for that extra $150 plus the $38 for the draw stops.