Thanks for all your comments. A couple of bits of feedback:
BR80 - yes, the first batch of BR80s were horribly over-greased and needed attention to fix. You can see the problem in a picture on my initial review of the BR80 which is in the same part of the Forum as the 6 month review.
I've only seen the new BR80s available as a standalone item in photos, but they clearly don't have the wheel treads blackened (so should run better out of the box) and do have a limited amount of red on the connecting rods. In my opinion, they still need a paint brush to look good!
Railbus - I was aware that Mike had an issue. On the other hand, I had no issues running the railbus on LGB MTS as an analogue loco for a week or two before I chipped it.
It's worth pointing out that all the Piko models appear to have 5-pole motors with different running characteristics to the LGB (Buhler) 7-pole motors most of us are probably used to. They draw more current, get hotter and are slightly more noisy in my opinion. That said, they perform very well indeed as you can see from pictures of my layout (albums bit on this Forum) and on YouTube (search for Whatlep or Ruritanian Railways).
(Edited for grammar and to add comment re standalone BR80)