RAF,
I'm not sure what you mean by this, but would like to find out.
There is the Yentai and Laiyang Bengbu sometimes called large and small.
There is also the Taiji PM version of Yentai Bengbu sometimes called middle.
Is this what you mean?
Or 3 types of training methods?

8 Elbows seminar...
What version of 8 Elbows?
Who and where?

And before I forget.
You posted a page with nice pics of Gao Daosheng. That was really nice.
Don't want to sound picky, but the 3rd character for his name is Sheng as in hsien sheng or "mister"

The web page listed it as Shen "spirit"