Then you are wrong, I stayed along Upp Serangoon before moving
to TPY.
When SBS took over, MK2 and MK3 were deployed. They started a SWT
till Sengkang during afternoon peak.
In fact, there were commuters asked for ADDs, but it was rejected
as Punggol Road low lying trees were not cleared yet.
ADDs were only deployed on the same day VO 2x went to 107.