The Wooden Dummu used in TWC is built so that the body of it will actually move (slide left-or-right) when hit or kicked hard from an angle - and this is an improvement that I reccommend to all wing chun stylists - as the movement will more closely resemble an opponent’s reaction.
In addition, I’ve padded the entire WD (except for the arms and leg, of course) - so you can go full power, which is also an improvement: again more realistic training. (And I’ve come to prefer often using very thin, semi-fingerless bag type gloves in this regard - so that I now can hit, kick, elbow, and knee as hard as i want.
In addition, sometimes I remove the arms and leg and basically use the WD as a kind of heavy bag that will move laterally when blasted.
As for the actual WD moves and sequences - I believe one should always be experimenting in this regard, so that you’re using the entire WD as a kind of spontaneous shadow-boxing apparatus that you will actually contact and improvise on.
And on a final note, and as mentioned on another thread, I don’t believe that anything more than once (or possibly twice) a week sessions on the WD is beneficial (once you’ve learned the sequences)…since working with a live partner is always a more beneficial training.
Keep this in mind, though: One of the biggest advantages to using the WD is the opportunity to develop powerful striking at short range while contacting a limb with the arm you’re not striking with, ie.- near simultaneous block-and-strike…
as well as using the same arm that may have just redirected or parried an opponent’s limb to continue on into the opponent’s body or head for a strike: again, a short range training device to work on powerul strikes and bridging all at the same time - from close range.
Once you finally get it that wing chun is meant to be used primarily as a close range striking system - you’ve been liberated from the idea that it can do things it’s not very efficient at…and seeing it for what it really is - it becomes better in its application.