After teaching Sub-D and character design this last semester, I saw many of the same problems with different students. So, I made a short video on how to repair sub-D geometry, plus how to model better to avoid problems in the first place.
This is on my brand new Professor 3D Dave channel, so you can help by subscribing / liking / commenting.
@theoutside Wow, great suggestion. My YouTube channel is called ‘Professor 3D Dave’ and the direct link is below. Please help the algorithm by liking, commenting and subscribing. You’ll be oh so glad you did.