Yeung Gor and Ling Wu Chung were the only two Jin Yong heroes to have benefitted from the swordsmanship theories of the Sword Demon Dook Goo Kau Bai. Yeung Gor and Ling Wu Chung, however, took very different aspects of Dook Goo Kau Bai's swordsmanship philosophies. Yeung Gor went to Dook Goo Kau Bai's cave, found his collection of swords, took the Heavy Iron Sword as his own, and developed a sword technique to use it with. Ling Wu Chung was taught the principles of Dook Goo 9 Swords by Fung Ching Yeung (formerly of the Mt. Hua Sect).
Imagine if Ling Wu Chung had found the cave of Dook Goo Kau Bai (in this scenario, Ling Wu Chung did not meet Fung Ching Yeung, and has no knowledge of Dook Goo Kau Bai). Additionally, all the swords of Dook Goo Kau Bai are available to him (Yeung Gor either did not take the Heavy Iron Sword, or put it back after his retirement . . . neglecting HSDS developments). Which sword would Ling Wu Chung have chosen? Would he have gone for the Heavy Iron Sword like Yeung Gor did (unlikely; it doesn't seem to suit him), or would he have picked one of the other swords? If so, which one?