that point about correcting the bon sao and how you don't need to if you've learn the tan sao and roll properly. You only need to "correct mistakes" if you have learnt mistakes - and we make sure that doesn't happen.
This is not classical Wing Chun, or even Jun Fan per se, this is Feng Wei, and we don't want anybody getting stuck in the classical mess that Sil Lum Tao and it's bunkai trap a student in. Our chi sao is freestyle sparring, as it our kb, and needs to remain as free as possible.
At the moment we practice dan chi and then roll the 4 positions, and the first strike everyone works is palm strike from tan sao with the jut sao block, as it corresponds to the jab loop drill done at boxing range. We do all this is the JF lead stance, not the fixed WC classical position, so there is mobility from day one.
, but remember the cardinal STMA rules - forget what you THINK you know and empty your cup and leave your ego at the door along with any belts and sashes you pick up elsewhere.