Maybe they have some hardcoded multipliers around there, typical...
I'll look into it for vanilla ones, if you want me to test with the modded ones you tried then link them :P

EDIT:
Oh, yep, after some deep digging I found what it actually does.
The sensor radius is just the radius it finds entities at.
Cutout radius is the regular mining one and it gets multiplied by various (hardcoded) numbers depending on what you're hitting:
Voxel + right click (no ore collection) = x3
Character = x0.800000011920929
FloatingObject = x1.3300000429153442

So, yeah... not gonna print all of those, I'll just do the no-ore one as 3x and adjust overlays to match.

Thanks for bringing this to my attention :}

You're welcome, and thank you for the response. The modded drill i use on my server is mexpex heavy mining drill, but the explanation you provided might explain that one too.