Thanks @andyp1per, I am using a SpeedyBeeF405-Mini flight controller. I’m excited to test this! 
Thank you very much for this fix! Now, when i rotate my knob on my TX, it switches to 0,25,200,400 and 600 (800mW setting in reality). Also, the power level indicator on the TX800 is now indicating/confirming the 800mW power level mode.
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Hi, i know this is out of the main topic. and i dont know if i should open a separate topic for this request.
I bought and installed a Micoair MTF-01. The range finder is working but i cannot find the FLOW_TYPE when searching full parameters. I think it was not included on the firmware. Please help me have this enabled for the Speedybee F405 mini. i hope this is possible. Thank you
Yes, I think you"re right! You have to build your own custom firmware. Follow the link.
I would like to test too! I have speedybee f405 wing and pandaRC 1.6w vtx.
Could you build for me? Thanks!