Few weeks ago (I'm newbie) usually I draw rough sketch. But when I put it on KSP, usually the size doesn't fit or it will cause a lot of trouble on launch. Since that time, I never use drawing board again and just attach anything that have docking port
I learn so much about patience and organization from your videos, thank you!
Btw, how do you make 3D satellite model like on your 1st tutorial?
IMHO, MS Paint will do better for slower computer, it's light and fast. Gimp has better feature but the startup and processing takes a lot more time.
But... I could highly recommend colored pens and plain paper for this kind of job