The "Chuan Gong Zhang Lao," either translated as the merit-rewarding elder -or- the martial arts-passing elder--do we know what his name is in DGSD? Somewhat Like Demonic Swordsman Dugu Qiubai (which is the greatest comparison this elder will ever receive), this elder was known to have killed an innocent man during his youth, and ever since then, he has regretted it. This was probably not an important point, but just in case it's one of those Jin Yong make-you-wonder-if-there-is-any-connection details, is there any hint who might be this innocent man that he killed?
(by the way, the lack of discussion devoted to DGSD lately is grotesquely unheard-of).