This page provides more details addressing some of Will's questions.

   2) fig 2: well, 500 chns is not a very "natural" unit, but I wonder
      what corresponds to 50 chns (e.g., the region of fluctuation
      250-300) ... I need to check my electronics readout diagrams
      again, or maybe folks more expert will comment

Fig 1.

Zoom-in of the god-to-bad region of BSMDE

Fig 2. 

'Good' strips belong to barrel module 2, crate 2, sitting at ~1 o'cloCk on the WEST

Fig 3. 

'BAD' strips belong also  to barrel module 2, crate 2, sitting at ~1 o'cloCk on the WEST