Old Frame Yang Taiji Posture

Hi,
There is an Old frame and New frame in Chen style.
There are also old and new frames in Yang style - the older frames coming from the Pre-Yang Chengfu generation (Ban Hou, Jian Hou), whilst the new frame is Yang Chengfu's form, sometimes known as Large frame.
The "old" frames of Ban Hou and Jian Hou are also further seperated as "Small frame" (Yang Ban Hou) and Middle Frame (Yang Jian Hou).