E40 LS2-
I'm asking under what circumstances do you want to reset trims so you get an accurate result to changes? And conversely when do you want to leave them?
For example, when working on improving idle by changing VE cells, I would think you need to reset every time you make a change and to not take into account log sessions where trims werent reset.
No doubt the answer to my question involves a lot of situations so perhaps responders could tell us about the most common operation that require reset or that you dont want to reset for.