I also bought the T962 in order to solder SMD packages with power pads. Did not apply firmware change, but used the kapton tape mod. Another error i found and not mentioned in www was a safety failure. The mains protective ground is connected to the metal case in such a clever way that the case remains isolated, which means: No protective ground. Basically the machine works, but is electrically unsafe (illegal!). I soldered 20 boards, two each time, no problem at all except strong (poisonous?) smell.
