Hello all,
I am kind of late with this discussion but a couple of points.
If Wong Wah Bo had 2 students (Leung Jan & Fok Bo Chuen), and both students had pupils, then all we need to do is take a look at how they preserve the teaching to find (cross check) similarities in forms/structure/movement/etc.. The teaching of Leung Jan most resembles the teaching of Yuen Kay San. Both are extremely similar so this whole secret footwork/art of Leung Jan is kind of an old story that should be put to rest.
Let me give you an small example of what I mean! The movements Leung Jan taught in as his root to the Koo Lo (from his original Siu Lin Tao set) art preserved by the Dai Sihing of the village are so close to the movements in the Yuen Kay San form you would have to say they stem from the same source!
Another example? Ok! Lets say you are correct that Leung Jan had some secret version of WC and only taught it to his sons and basically watered down the art for the rest of the people he taught his "whole life" then that would mean the art that Wong Wah Bo taught him was the only real secret methods and the stuff he taught Fok Bo Chuen was the odd ball changed one? Why would he do that? Leung was not related to him? Yet! They are both too similar for that to be the case! Yet again! He taught his own nephew (family member) Leung Bak Chung in Koo Lo village the same compact (or as you call it "modified) WC that he taught eveyone else so we can discard the secret family story.
Our village information maintains that while Leung Bik did learn some WC he was not very skilled. We do not get any self promotion out of saying this (as the Koo Lo family does not have any public school or make any money from their families WC) so maybe the info is correct and maybe not. Also, the fact is a few of Leung sifu's Futshan students knocked Bik is well known. Plus! Yip Man's "own" written history makes no mention of Leung Bik in it.
Another yet! If Leung Bik was into this real secret art that was only passed down in the Leung family then what makes you think he would teach a boy who he did not know sqwat about? Yip was not his family! The Fung family of Koo Lo hardly ever teaches outsiders/non family. Hendrik also mentioned the Cho's hardly ever teach outside the family. It would not be common in traditional Chinese Kung Fu family way!
I think the Modified/Traditional story has seen its day. Most Red Boat Kung Fu looks pretty similar so even if all this info is incorrect we can go with what is more likely than less likely. We are better off talking about technical stuff as its easier to learn from!
Regards,