Anyway, just to update some deployments again:
SBS9312S
(BN SP) - (BN 6)
Convert 1 ASD to 1 ADD duty. The ASD duty formerly done by 702J
before it died. All other Sv 6 permers (including the 2 perm DDs -
9420M & 9537K) spotted for the past 2 weeks, except for the
now-dead 702J. No other long-time cameos on 6 as well after 702J
died other than 9312S. Service 6 now has 3 perm DDs for
Weekdays.
Quite an improvement considering it used to have NAC N113CRBs
doing 6 in the past when it was full SD fleet, then improved to a
couple of Mk3s, later on WABs of 8497Z & 8517A. Then added
9537K after they converted the first ASD duty to ADD, then later
another ASD duty converted for 9420M, followed by adding Mk4s of
889D & 2710Y and now this 3rd DD for Service 6.
No idea why the lone WAB 8497Z is still on
Service 6 though. 
And definitely not to mention when svc 6 got 'famous' for a short
period of time when 8031J was put on it as perm..
I guess nobody would have thought that such
an industrial svc would get a new demo.But nevertheless,i think
that svcs like that getting new demos is also something good and
new rather than always all the popular city svcs getting
them..