If you are serious about PS3 repairs, keep a dedicated Teensy 2.0++ with v12067 as your primary flasher.

Switching to changed everything. On the first attempt:

Create a batch file to automate backup and flash:

At night, when the town went quiet and the bench lights cast long shadows, the Pflasher sat crosswise on a towel, its cable looped like a sleeping cat. Its LED pulsed once every few seconds, not the mechanical blink of a clock but the steady breath of something that had learned to care. It did not save the world. It saved what people lost along the way: a voice, a photograph, a song, a pattern of code that remembered a person. And in that small, unflashy way, it was the best anyone could hope for.