STL to 3MF Conversion Needed

I need assistance converting an STL file representing a mechanical part into a 3MF file. During the conversion, I require minor adjustments to ensure the final product meets my specifications.

Key Requirements:
- Convert the STL file to a 3MF format.
- Make minor adjustments, specifically adjusting dimensions slightly and ensuring print quality.

Ideal Skills and Experience:
- Proficiency in 3D modeling and file conversion.
- Experience with mechanical parts and understanding of maintaining print quality.
- Ability to make precise adjustments to dimensions as needed.