I have the Z11, and have loaded firmware made by the manufacturer only. Do I have to do anything special to load your firmware onto the miner, and do I have to do anything special to load a regular version afterwards from the manufacturer? I haven't seen clear instructions, and I'm new to custom firmware.
you will have to unlock the miner with a SD card first. The Sd image can be found on the first post of this thread. After that you can go back to stock by upgrading from the miners gui
Is there a method that no need to usd the SD card to reflash the firmware of the miner? if flash more than 20pcs miners in the farm, it is not a easy job.