How to make a "3D->2D ready to cut" drawings ?

 From:  routb3d
Check out Terraflat for Rhino. Terraflat may have been renamed to Exactflat. Not exactly sure what has gone on there. Also, Within Rhino there is a squish command which may be a good fit for flattening in your application. Lamina is pretty good but desperately needs to be updated.