Any Voith Wright on 168 would most likely be kicked out sooner
by the SL cause they are really damn slow and cannot cope with the
pace and frequency during peak hours. So it wouldn't be surprising
if 3072Z gets kicked out from 168 to 10, seems very likely already
from what i can tell.
The only reason why 3008K is still on 168 is because it has that
MDIS ad contract. Otherwise 7569G would have went over from 17 to
168 for the swap already.
Actually initially when 3072Z was brought to BN, for few weeks
it was stuck to sv10, possibly a temp perm before wrights were sent
to it from AR. Cant tell much about 3072Z status cos Im not around
where sv168 route is.
Voith cant really feel its sluggishness on a wright from what I
feel but it does have a difference on a mark Iv dm. Can tell that
ZF more suited for high speeds and it picks up fast. A voith on a
Dm can feel its strain when at higher revs as though its band has
been stretched. My 2cents worth. 
