Heard the story.
I have heard that story in the past. Lam Sang was supposed to be around 18 or 19 years old and Lam Sai Wing was in his 70s. This was reported in an old issue of inside kung fu magazine. Lam Sang was said to feel bad about this fight. It is said that he felt as though he took advantage of an old man. Lam Sai Wing supposed to have stop accepting challenges after this incident. If this story is true, it shows that Lam Sai Wing, dispite his advanced age was willing to take on anyone. Props goes to Lam Sai Wing.
Peace
Jerry Battle.
The Southern Fist Subdues The Fierce Mountain Tiger