I want to make a design library for finger joints. The only problem is that the imported design feature cuts all bodies, instead of just one.

Instead of cutting one plank, and not changing the other body, it cuts both, resulting in two bodies with the same cutout.
It should just cut the rectangles out of the red body, and leave the yellow body untouched.

The cut is a defined blind depth, not trough all, because that would cut other bodies in the part.

Is there any way to define on which body the imported design feature should work, or to exclude other bodies?

The only work around I've found is to dissolve the feature and change the extruded cut, but it feels like this isn't a good solution...

(I've included the design library part in the attachment)

Thank you already