Tactical Sheep has a video of his 3d printed brass deflector test on Instagram, which he has direct-sold to people on this forum. Perhaps someone can post is Canadiangunnutz user name so you can message him, as I couldn't find it in a casual search. As an aside, would having a second WK-180-C charging handle on the right side or even an oversize extended charging handle, like
FedorTokarev posted on Reddit for his CX4 work as a brass deflector? For those of you who run the charging handle on the right side on the WK, do you get less brass marks then those who run it on the left side?