Yes, another Sai Mun Chui Sheut thread.
The general impression of Sai Mun Chui Sheut is that he knows the sword and very little else. Sai Mun Chui Sheut was also said to have been an expert on identifying and purging poisons. He alone knew how to save his future wife Sheun Sau Ching from Seung Gwoon Fei Yin's poison needles (Luk Siu Fung and Fa Mun Lau had no idea what to do). Similarly, Sai Mun Chui Sheut was the only person who knew how to save Au Yeung Ching from the Tong Family's poison. In the HAUNTED VALLEY novel, Luk Siu Fung also alluded to the fact that the forest maze that separated the Haunted Valley from the outside world would not be able to keep out Sai Mun Chui Sheut because SMCS was a master mathematician who could calculate his way through the maze. Furthermore, Sai Mun Chui Sheut was a successful businessman who owned and operated one of Beijing's most successful bakeries. All this makes him sound like a jack-of-all-trades like Jin Yong's East Heretic Wong Yerk See rather than a singleminded sword expert.