Hey Dawood!!! I didn’t forget! I just had my workshop and then had to quickly wrap up that skull painting for the LA Art Show. I’m totally on it! 
thank you friend!!! and I totally understand and really appreciate it!.
That skull painting is so, so amazing btw…
Hey Dawood!!! So sorry about the significant delay on this. The last few weeks were a series of one thing after another and then I got sick somewhere in the middle. LOL! In any case, I made this short video for you about the considerations that I think you should have in mind when establishing that initial gradation. The same type of pressure variations are at play from the last video in an effort to develop the appropriate evolution of values while working to minimize exposed troughs in the heart of the transition. Now this gradation is not fully developed (fully “cleaned”) but it should give you a good insight into just how I launch into it. In any case, I hope that this helps!
@AWaichulis no worries at all, just really appreciate you taking time out to do this 
THANK YOU!!!