I’m impressed that you managed to do all the battery swapping without shortening anything. I think I destroyed one of my cells by accidentally having two of the contacts touch when I did some similar experiments. Maybe you are interested in one of the insulation tips from this thread: Isolating battery clips
If it turns out that you also ended up permanently damaging one of your cell, don’t hesitate to ask me for one of mine: JGNE 18650 1800mAh original MNT Reform battery giveaway
I created this issue for the handbook to not loose track of this: documentation of old battery mapping is wrong (#3) · Issues · Reform / reform-handbook · GitLab