When two arms are combined, it will be a constantly floating combination of DAR / WU -
Arms with either Outside,
Inside or Diagonal contacts,
however the Diagonal Superstring can only combine with the Outside superstring and will always be WU/protecting in its full lenght.
The position at the Diagonal Superstring furthest from the body now becomes an Inside Fook Sau rather than the above Chaan Sau if only one arm.
When punching or meeting pressure upon contact, always seek/aim for the farthest "endpoint" at the Superstring whether it is a DAR or a WU position
Closing or Splitting.
However when coordinating arms ( Neutral DAR / WU - "Chain Punches"), always allow the WU to receive/control,
in order not to push the opponent away, by "bringing the body to the elbow" by the DAR pulse.
Never bring back the WU arm based on "eye Information" resulting in instant pressure loss and consequently - Total lack of protection.
When being frontal with double neutral/controlling contact from IRAS (Basic Poon Sau - 1.Sec.)
it will be the Outside and the Inside superstrings with Bong Sau and Inside Fook Sau variations,
in either double Closing or double Splitting contacts in order to maintain status quo.
When being in Fighting Stance, the rear leg/direction has been chosen (Applicated Poon Sau - 2.Sec.)
and it will therefore be the Outside Superstring combined with either the Diagonal and Inside Superstrings, with one Closing and one Splitting
contact either as DAR or WU.