For me, once only, onboard an unidentified C751B.
That was 2 years ago in March, and I suspect it was
a newbie driver then, as he would either underrun alot or
overrun alot (of course needing to reverse), making that ride super
uncomfortable.
OH!
Then that was the last time I also took this C751B on EWL, from
Dover to Tampines, every stop also underrun or overrun~...
Delay backup like siao~...
At Dover the next train was 5min after him.
At Tampines the next train was 1min after him 
Then after that, eight trains(I counted till 8, am sure there are
more), all 1min freq 

