Hi.
I already saw your air duct. I am a mechanical engineer very well trained in the design concept and 2D/3D modeling. I am also skilled in the metal-sheet folding field, therefore, the metal part will be created with 100% accuracy.
I can offer a great vary of stuff:
-2D PDFs and DGW, annotation files for constructions
-3D Native, neutral and PDF files. Yes, even 3D files.
-Stress analysis.
-Renders (motionless or animated).
and much more.
My price is unmatched, while I keep the best quality in the market.
So, as simple as that: Cheap and quality.
Stay awesome.
P.S.: The milestone and time can vary depending on the amount of time I need to invest.
If you have some files, or if there are files in the wild that we can use or many other factors. We need to discuss these factors prior to a contract.