I've been given this model, no drawing attached (Imported as a .stp file) and need to be able to produce a drawing for our CNC machinist to make. Trouble is, you can see from the model (attached JPEG file) that there are some unusual profiles. I just hovered over the until this lines showed up and selected them.

I've put the model into a drawing to see If that works, but there aren't any clear radii I can select.

Any ideas?

Thanks

**added the model**