I just put out a detailed tutorial covering only two moves, but not only the mechanics also the specific and detailed internal protocol for each one. Each of these, by itself, can be the key to the entire 'parent art' (Xingyi and Tai Chi, respectively). The two moves are the Crush Fist from the Xingyi Five Element inventory, and then the Center Silk Reeling from the Chen Style Tai Chi inventory.
Somebody who attended the seminar wrote to ask me about the Crush:
Q: Awesome vibratory charge from this! Is there even yet more to be milked out of this one?
A: Yes, if you are now feeling everything I talked about in the film, then the first thing is, it will keep getting stronger and stronger, to the point you'll be amazed. But there are further specific stages and phenomena also. You will soon (or eventually) realize that your initial 'gathering' gesture will 'scoop' power to your sacrum, not only from your shaped fist compressing into your dantian as taught in the seminar and film, but augmented directly from your feet and legs. Basically blasting up from the power foot and leg (rear).
This is not some imaginative philosophical visualization, it's a straightforward internal energy operation. Of course, you can feel the foot-originating 'wash' of the soft wave right now, from the fist uptick add-on after the main strike (you should know what I'm referring to with this!). That's an after-charge.
But what I'm talking about here is something else. It is a foot surge as a pre-charge, incorporated into the initial compressive fist activation gesture that begins a completely fresh rep. (If you haven't been to the seminar or watched the film you'll have no idea what I'm talking about here and that's as it should be :)
Anyway I may get into that if/when I ever write a book covering more of this stuff and laying out the entire Xingyi energy protocols for the whole inventory. But for now, work on what you have and enjoy when you get to that foot incorporation stage, it's astonishing and amazing when you get that and you learn to control it.