Thank you for being cordial and polite.
There are 1000 ways to skin a cat, but we are just trying to learn one way to play a hand.
"In the first Biu Sau video, launch the Biu Sau but keep the other hand in Wu Sau as a back up in case the Biu Sau fails to redirect.
I have an issue in him saying that Biu Sau is not an attack , most deflections in Wing Chun can continue straight through to attack if the opponents counterforce is weak."
I see what you are saying about if the Bui Sao fails to redirect, and I understand why the Wu sao there would be a good idea, but we are practicing to develop a bui sao that will be strong enough to clear the attack every time. If I start with my hand a Wu Sao though and try to bui, I think that Ill be late in catching his punch with bui, especially if your opponent isn't throwing WC centerline punches, their fist wont reach center until its hitting your face. As far as the second part goes, he did say that if you bui sao and he is weak, or you go indoor and you poke him in the eyes, that's just collateral damage. If the opponents punches are strong, you might want to deviate off center slightly to clear a heavy fist, but if you are confident a bui sao to the centerline will work just fine vs your opponent, then go ahead and do it.
"The second video also had the Tan Sau deviating off the centerline , which means if there is no counterforce from the opponent then your Tan Sau will actually go through to strike the opponent somewhere in the shoulder area instead of the face or chest , again this goes against the principles of the first form and sticking hands."
I'm not so sure I agree here.. If there was no counterforce (a strong punch) then my tan sao would end up exactly where it shows in the video. it would not extend all the way to the opponents shoulder, there is no need. This IS actually in the SLT form in the 3rd section, you have Tan Sao from the tucked position through the center line and to the shoulder line, guan, tok, huen, di juk, tok, huen.
"In my lineage we prefer to use tan sau in a counter pierce movement on the outside of his arm from the same side arm , if we were to do it your way we would actually use a counter punch instead of the tan sau , we feel it is a stronger , more invasive movement."
Ya you could do that, I assume you are talking about if your hand is back close to your body and you use forward tan sao energy to centerline.
I would probably use juam sau or pak or if my hand was out further, a guan sau.
I think I know what you mean when you say if you were to do it our way ( opposite side hands instead of same side hands) you would punch because it is more invasive, yes agree with you, but again there are 1000 ways to skin a cat, and we practice doing what you are saying in a different drill. It jsut depends on how you are feeling that day, or how you want to set him up.
Thank you for your thoughts, cheers.