- Joined
- Jul 2, 2014
- Messages
- 7,594
You might be old school if your CAD system is a desk, a t-square, some triangles and an eraser mask, a rotary lead sharpener, some vellum, and various pencil leads from around 2B to 6H hardness in your mechanical pencils. Wait, that is my current CAD system, though more usually it is the back of an envelope...