Solid Difference Issue

Hi everyone, I hope you're all doing well !

I'm having an small (hopefully) issue with my solid difference. I'm trying to pierce holes in my base geometry (3dprinted) to be able to put my panels (cnc) inside of it but the solid difference returns some weird results :(
I've been struggling with this since yesterday and I'm sure it's simple as pie but I can't figure it out.
Baking is not an option because the base geometry is one of the parameters of the project.
If i graft the list, I just get overlapping separate difference solid so not helping either :/

If you're intersted the definition is no yet complete, once the solid difference will be done a pattern will be cut through the solid 3dprinted base and a light source will be added on p(0;0;0)

I ll join the gh definition (I highlighted the difference in red) (btw if there's any other comment you want to make regarding the definition, plz do, I'm still a newbie ;) )

Thanks in advance !

Cheers