Hi Chris.
I hope not a stupid question..... Could the battery problem be system related insofar as the battery itself increases its resistance internally?
NTSB is looking at manufacture defects, leading to internal shorting, (on a "microscopic basis"). If this is happening, is there some point at which the battery cannot be controlled externally?
The NTSB isolated the #6 cell as the source of the initial runaway. Working backward, where do you see the failure as initiating? I know it is a general question, but could you contrast physical separation cell/cell, and circuit isolation?
Are these two problems independent? We don't see the ability to separate each cell from the circuit, do we?