STL to STEP Conversion

I have an STL model that I need converted into a clean, watertight STEP file ready for 3D printing. No geometry should be lost or distorted in the process—surface continuity, feature integrity, and overall dimensional accuracy must stay intact so I can import the part directly into my print-prep software without extra repair work.

Please use whichever CAD platform you’re most comfortable with—SolidWorks, Fusion 360, Rhino, or similar—as long as the final output is a standard .step file that opens flawlessly. A quick turnaround is appreciated, and I’m happy to answer any questions or supply the STL as soon as we start.