I just reversed engineered the control board for a large part (of a 380 Amp model). It will be enought to write some custom firmware or port over BLHeli or SimonK. The control board stated "ESC-HV-MCU-2", and is probably used in multiple flier model/alien power ESC. It has a nice 6 pin ICSP so...
Hey yes that's a good idea! I got a couple of them at home but the firmware is quite limited and closed. I will try to help writing some firmware and test it. Do you got the schematics at a higher resolution perhaps?