I am trying to reproduce 19th century engineering here. I need to knock off the corner of the flat cyan “solid” so that it fairs into the gray “solid.” Obvious they will never match up because the gray extends beyond the cyan at the sides.
However, the desired effect would be to knock off the corner to the cyan roughly matches the gray where these is overlap.
The curvature only needs to extend an inch or two.
What might be a good approach to doing so?