Yeah great video, i've wished I learnt the importance of what your talking about from when I started. I find with a lot of scratches as well like the 'Tips' scratch, it's better to understand that as a baby scratch - not a separate scratch - as it illustrates what exploring even the first scratch you learn can lead to if you play with it. Another thing I wish i'd learned to do with every scratch as I learned, rather than going back through each one was to do it in the opposite direction/in reverse. I think if your a complete beginner, learning a baby scratch with a forward release at the end, into an immediate reverse baby and drag back, would be a great thing to learn and gets you thinking about that one scratch from two different starting positions. Again then when learning the chirp or stab scratch as the next step, learning both from the forward movement, and from the back, when your a total beginner will be possible and you will then grow both forward and reverse variations of each scratch at the same time and not have a dominant 'forward leaning' style. I feel when it comes to starting to put combos together, different scratch techniques or patterns your doing, end in different ways and positions and if you haven't got the 'reverse' ways of executing each scratch, your limited by where your at in the sample