Quite straightforward, I used a ch341A SPI programmer. Just make sure you take multiple copies of your original ROM image and compare the hashes of them to make

Quite straightforward, I used a ch341A SPI programmer. Just make sure you take multiple copies of your original ROM image and compare the hashes of them to make sure there was no screwup. It took me about 10 minutes to do my ThinkPad. All I lost was some enhanced integrated GPU power management and integrated thermal management, but I use a userland fan control program anyhow.