Curious about it, will look into and see how it differs from Reef-Pi. The nice thing about the Sonoff being reflashed with Tasmota firmware is that it is it's own entity and doesn't need anything else to work. It has it's own GUI that you can setup a WIFI connection, MQTT, dosing schedules, and it even give you the ability to change the GPIO pin configurations (not sure what benefits this serves though). Down side it isn't a simple upload new firmware. You need to have a breakout board, and do some basic soldering to provide the connection to put it in the upload firmware state. Then it is just a simple push via some software on a computer.
But to keep us on topic, I would love to see the ability to reflash the Jebao controller and integrate it with my ecosystem.
@snackpack please let me know if you end up going forward with this. I only have the one controller, so I can't just take a plunge and risk taking my return pump out of action. If you get it to a point to where you reflash and it will give basic functionality (stay on @ set speed), I'll do it as well and help where I can.