Thanks to Chee for providing the links. But not knowing Chinese I didn't know what to click on.
Hit and miss didn't work for me.
But I have seen pictures of Lun Gai's work I think in one of Leung Ting's books and I saw a brief video of Lun Gai on the dummy.
I think FWIW that good wing chun in Hong Kong really progressed much beyond what I saw of Lun Gai. Kudos to him for preserving what he learned.
Students learn only part of what a good teacher knows-though they can point towards a teacher's knowledge.
joy chaudhuri