I have a site with ~100 articles on it. When i made this site 4 years ago, I was a noob to IM and had no clue regarding proper silo structure. After reading BTB's post and rankxl's course, it seems I missed a crucial ingredient in an authority site build plan and now realize the real value. My questions: 1. Have you successfully restructured a site for the better? 2. If I change permalink structure, are my backlinks now worthless? eg. change from %postname% to %category%postname%, will links pointing to just the postname not work now?