After closely reading ROCH for the 6th time, I noticed that YG at 36 should have not one palm, but 2 palm styles.
1st is his most powerful technique of all, the Melancholic Sad Palm. Consists of 17 stances. Relies on the internal. The palm power as shown in the JLFW vs YG fight is enhanced when YG is depressed or sad(similiar to how XF's XL18Z's power would get enhanced when XF drinks wine and gets semi-drunk).
2nd is what I call the Sea Palm or Wave Palm (wierd name eh?). Power should be the same as the unenhanced Sad Palm, but once Sad Palm's power is enhanced by sadness, the level in power should be completly different as evidenced by the battle between JLFW and YG.
After closely examining the ZBT vs. YG fight, I found out that YG used 2 different types of palm technqiue. When YG first began the fight, this was what it said:杨过左手还了一掌,猛觉得对方拳力若有若无,自己掌力使实了固然不对,使虚了也是极其危险,不禁 暗暗吃惊,当下展开十余年来在狂涛怒潮中所苦练的掌法还击出去。Later, before YG used the 4 stances of Sad Palm on ZBT, this was what ZBT commented on "sea" palm-周伯通打得高兴,大叫道:“好功夫,好掌法!这一架打得可真过瘾。” that underlined part clearly shows that this is a different palm from Sad Palm because YG hasn't used any of the stances of Sad Palm. Later, after losing the battle when ZBT used L/R tech, this was what happened: 你双手齐使,接一下我的‘黯然销魂掌’!”Saying that ZBT should try to recieve his Sad Palm. He later used these 4 stances- 拖泥带水’, 杞人忧天, 无中生有’, 心惊肉跳 which all haven't been used in the beggining of the battle’. After ZBT tried to force the remaining 13 stances, YG used QZ palm and 9 Yin arts on the defense. YG didn't show any of the remaining 13 stances and later when YG did, the 13 stances were all completely new, so this showed that YG didn't use it earlier in the beggining. This also would mean that he didn't use any of the Sad Palm at all in the begginning, yet, YG was using a palm style in the beggining of the fight.
So? This means that YG used 2 different palm styles in the battle with ZBT. One is his famous Sad Palm that completly turned the tide of the battle around. And the other is Wave or Sea Palm that he uses against typical opponents. So now, I think YG has another art in his arsenal.