Remove intersection between one brep and many other breps

I'm trying to remove the intersection between one extuded surface and about 10 other extruded surfaces. What I want is then the first piec with alot of holes in it where the other breps have intersected it, so that i can print and build it irl.

I have tried to use solid differens, but since i have so many different breps intersecting the first i get one brep for each intersection.

This is what I have:

This is what I get: