Anyone experimented with trying cgminer for the S3 on the C1?
You need the cgminer binary for the S4. It will get replaced every time you reboot the machine, so you will have to re-copy it over. You also will want to adjust /config/cgminer.conf and /etc/init.d/cgminer.sh for the correct parameters you would like to use with cgminer (like the queue setting)
The firmwares are not interchangeable. Why do you want to do this?
I don't think he's talking about swapping the firmware, just replacing Bitmains broken cgminer fork with one that works properly on pools like p2pool.