Please take a look at this small example, it illustrates how inaccurate make 2D is compared to technical drawing:
Make2D:
Technical Display:
Side by side:
The curve bits are larger than the file tolerance of 0.001 meter.
3D file:
Make2D_Slow_and_inaccurate_on_mesh.3dm (1.1 MB)
This is a small portion of a large 60K mesh that I tried to make 2D of, but that took for ages, Rhino would not esc cancel the process and didn’t respond, so I made this small example out of it. (Original mesh is generated in Rhino through RhinoCommon, so it is just a clean, multi disjoined mesh)