A Trio of Tank Troublemakers

I have harvested all the information discussed and proposed in my RMweb thread for the layout’s locomotives here: https://interlocking.blog/brighton-trafalgar-lbscr/locomotives/. The most significant is (with lots of help from @Nick Holliday) establishing plausible actual locomotives for the layout for the models I have in my possession.

As per the header image, I’ve managed to get chips in my other three locos. Unfortunately, this trio are far more problematic than the E4 or Atlantics. Both Terriers are very jerky runners. I had hoped the even power on DCC would improve that from DC, but it looks like I’m also going to need to fit stayalives in them.

The E2 has had the tank sides rubbed down and the start of the weathering removal process, but is probably the least consistent runner of any of them – it’s almost as if the motor armature is getting stuck, but it could be another inconsistent pickup with the rigid chassis?