I started scaling up plans for model airplane magazines when I was 8/9 years old. My mother bought me a Cleveland kit of a Clipped Wing MonoCoupe with a 32" wing span ( little sticks and tissue), for my 8th birthday. After that I was hooked, and couldn't afford to buy plans or kits so I scaled the mag plans up, drew my own plans and my saved my penny's for material. I can remember my first Quarter, sure helped my money collection. So been doing technical drawing all of my life. I have worked with a group of engineers that couldn't pass a high school mechanical drawing class. I would check their drawing and circle their mistakes after printed off with a big red pen. They liked that.