I've got to say that while it's clear that Peter Ledermann is very knowledgable on the subject, his presentation is more than a bit confusing. For one thing, as he's talking, using a pen to represent a tonearm, and pointing left and/or right, he doesn't provide the visual frame necessary to inform the viewer which of those directions is toward the outer or inner edge of the record. And without an actual demonstration, I find it difficult to understand what he means by setting the stylus down 'between the runout grooves' and 'on the surface of the record.' Guess I'll search online for some video demonstrations.