Very interesting! I have been using a more "knowledge" based approach but you helped me understand why this is a superior method for accuracy. How would this be applicable to figure drawing, say on the scale of a normal drawing pad? The outside-in method there helped me to get the structure correct, but I can see the same problems as you mentioned here for example when the time comes to build up the head and you already have not-so-accurate constrution lines. What would be the "inside" on a figure? Since distances there tend to be a bit larger. Do you finish the head first for example and work downward?

I have two questions: 1. Are you drawing sight size? 2. How do you know you won't run off the paper when you get farther away from your starting point?