I’ve been working for a while on this, and all of the sudden I can no longer use the outer shell tool because it tells me some things are not solids. I’ve investigated every shape and carefully build them, I can’t seem to understand why this happened and why at that point of working on the file. I even tried copying groups that were not a problem before to a new file, but now everything seems to have a problem with the solid. I’ve attached the file below, any help would be much appreciated.
Roodtop 2.stl (151.7 KB)