I build custom motorcycles and have an Industrial Design degree. I'd like to get a 3D scanner in the shop so I can scan areas of a stripped down bike to design new parts.

I'm used to working to tolerances , i.e. +/- 0.5mm for mounting hole locations on a part to be manufactured. It seems 3D scanners are based on resolution and not necessarily tolerance. What kind of specs should I be looking for in a 3D scanner to gauge it's accuracy?

For instance, if I want to design a new seat for a motorcycle but use the existing mounting holes I would want to be able to work from a 3D scan that's accurate down to 0.5mm in order for the part to fit correctly.

Does anyone have any recommendations? I'm looking to stay under $500 ideally. My other requirement would be a scanner capable of scanning an entire motorcycle.

Thanks for the help. I'm obviously new to this.