Nice guide, I was also thinking of that technique (which is not really a technique) when you're hiding behind a wall or something, and you manually right-hand shoot without showing yourself too much you know.
Quite useful depending on the MS.
Oh and for units that can hit more than their actual KD combo (like Crossbone), I've seen people using turn slash to avoid the KD on the last hit, and continue the combo (eg. 1-2-3 melee, TS, 1-2-3-4 KD, sometimes even adding a w2 shot in between).
Also, imo if you want to learn MCA (particularly air catching) and turn slash, you might want to increase mouse sensitivity. A lot. Default is 50% iirc, but I know a lot of people who use maximum sensitivity. Just some advice.