Ok working on the formal last bits now, grouping/layering the objects correctly, solving errors. I am supposed to fix non-planar faces, I found them by using the cleanup function, and have it to select them instead of cleaning them up. Problem is, I just won't understand what non-planar faces are... I assumed they are faces that are not flat, when faces have 4 or more vertices and on different heights. But I have these faces with 3 vertices that show up as non-planars, so I have no clue lol, thus I do not know how to fix them.