A mechanical part I received as a STEP file shows multiple surface imperfections—open edges, self-intersections, and stray faces that prevent it from being watertight. Alongside that flawed file, I can supply a clean reference STEP of the same component in its intended state. The task is to rebuild or heal the original model so it matches the reference while retaining correct dimensions and design intent. I do not expect dimensional or geometric revisions beyond what is needed to restore perfect surfaces; the focus is on achieving a defect-free solid ready for downstream manufacturing (CAM, FEA, 3-D printing). Deliverables • Fully repaired, manifold solid of the part in STEP format • Native CAD file from whichever platform you use (SolidWorks,, Fusion 360, .) for future edits • Brief note summarising the repair steps taken and any areas that still need attention (if any) Acceptance criteria: the final STEP imports into SolidWorks without errors, passes knit/verify tools, and shows zero gaps or overlaps when checked with a standard healing report.