as you should know not all can be covered on these videos, trial and error and posting reposting is the best way to learn. IMO, I believe for all of us here that started when there were no books videos or forums, this is how we learned I do not remember even classes any help at all. Don't get me wrong the videos are great and I wish I had this available when I learned, but the time to make these is very very time consuming. I personally focus on basics when I make videos the rest should come from the user. I just started a new Surface & Solids creation for x2 video two weeks ago and it will take 3 discs maybe to complete all I have in mind from a real world perspective basic surface advaced surfacing and basis solids with surfaces.
Just keep asking questions but be ready to trial a error yourself it will stick for life if you do it and not get the answer from somebody else. Trnsform toolpath does so many different thing it can be a whole video cd in itself . send your part I will see if I can give any insite