I frequently read how each of the people at Jueyuan's deathbed each received one third of the Jiu Yang manual from the verbal recitation. Surely no-one thinks this is the case?
Each of the people: Wuse, Guo Xiang & Zhang Junbao (Zhang Sanfeng) listened and came away with a version of the manual that formed the basis of a formalized system of internal power cultivation. Incomplete compared to the original Jiu Yang manual but consistent within its own version.
The characteristics of each version:
Shaolin: deep
Emei: broad
Wudang: pure
A reflection of their martial cultivation and experience at the time they received the Jiu Yang teachings.
I can't believe that the power of the various Jiu Yang gong is only 1/3 of the original.