Okay, finally went to my storage area and found it:
http://www.youtube.com/watch?v=PtJNf7vkWcU
That's the version he learned from Shi Degen, way back when. So there is clear doubt that he made it up himself.
compare to his newer version, all he did was add more moves from the Chan Yuan Gong set:
http://www.youtube.com/watch?v=kb8ifq9xM00
and the history part at the beginning tells about there being 3 sets.