I already have the STL model in hand, but a few unwanted protrusions are making it impractical for 3-D printing. Your task is to surgically remove only those raised areas while keeping every other surface, dimension, and wall thickness untouched. The cleaned file must remain watertight and manifold so it slices flawlessly in Cura/PrusaSlicer without generating extra supports or errors. A quick turn-around is welcome, but accuracy comes first. Deliverables • One print-ready STL with all specified protrusions removed • A brief note confirming the edits and that the mesh passed an integrity check (Netfabb, Meshmixer, or similar)