Yes, it helps knowing on what models it works.
So far, reported not to work on:
- 5D3 1.2.3
- 1100D (magenta)
Works properly on:
- 5D3 1.1.3
- 6D
- 1200D
- ... ?
I have doubts about 70D and 100D (the former shares some internals with 5D3.123).
Just doubled checked the 6D for you, magiclantern-raw_video_10bit_12bit.2018Jan31.6D116, grayscale works.
I previously owned a 70D and feel like i used grayscale then and it worked but that was more than 2 years ago so take that with a grain of salt
As always, thanks for all your hard work and let me know if theres anything I can do to help
