@blanchsb Hmm, not sure where those faces are coming from, but you can simply select them (in face select mode of course) and X > Delete Faces.
I have HardOps myself and it is great for easy Booleans. Doesn’t create nice topology though (it’s still just Booleans!).
Like Miranda said, watch that live stream and maybe some of the demo’s you can find on the website: https://hardops-manual.readthedocs.io/en/latest/
It’s worth the money if you want to make those kind of things, but personally, I have hardly used it so far (you do get lifelong upgrades!)
