Well we made it despite waiting 5 mins+ for busses once we actually got to a remote stand, which must have been around 0912 local.
10 mins bus ride to the drop off gate, up, up, then across to the Z/B bus shuttle as it was running. Luckily one there that left within a couple of minutes. It had to wait a couple of mins at B57 to drop of as another bus was already there, fortunately that meant the bus for our flight couldn't get onto B55 either.
We literally got off, entered B57, turned right, and boarded the bus at B55. Without some things going in our favour we'd have had no chance. 1hr15 connection on the return, though not so fussed on the way home :-)