I have an older 12V 206Ah SOK in my RV that I just upgraded with SOK's latest bluetooth BMS. I am seeing individual cell voltages for the first time. When charging, one of the cells becomes a runner and trips BMS overcharge early (14.0V; cell diff 0.175V). That also shuts down the RV's inverter-charger early. Most of the articles I found here refer to balancing cells in series, out of the box, with a bench-top power supply. I would like to do it without removing the battery and taking it apart again. Can it be done in-place with a bench-top power supply? If so, can you point me to instructions? I did find an old reference to a top balancing guide but could not find it.