Trimmed Brep with Spheres

Hey everyone!

I want to make round cutouts on a brep. So Ive tried populating it with spheres and then trim but some of the spheres dont cut through the whole body. I could make the radius bigger but thats not desirable. Any of you got an idea how to go about this problem? Did I do it the right way?

Also Id like to extend the "wave" to the corner but only the top part. So the bottom point is the anchor point while the top fans/flows out into the corner. Is that possible to do in GH? If so how?

Thanks in advance for the help!

Due to the issues while trying to upload the definition I had to upload it to wetransfer.

/Link: https://we.tl/UShOEc1sAB