You're the man Bruno, your playing is sounding killer here on your channel btw! Cheers

Graham, thank you for taking the time to comment and for your kind words. I am confident you'll have it cracked in no time at all and would suggest you focus on the CAGED system and Chord Rotation videos which I uploaded recently, and then move on to the content in the Spicy 2-5-1s video. They provide further breakdown of the material in this video which will speed up the process for you! Feel free to reach out at my website if you would ever like to book an online session in, I always enjoy speaking to new musicians. Best, Charles

Certainly will get to that soon! Cheers for your comment

Melodic minor video going live today at 5pmBST, hope it helps! Cheers

and their related 2 chords. These examples take it to a ludicrous extreme in order to fully comprehend the possibilities. I'd recommend sticking to dominant chords, their 2 chord, and the vii chord of the key (the half diminished). Cheers!

Guitar rig to the rescue

The substitutions are exactly as you say. You are able to substitute up or down and minor 3rd or tritone through the family of four. However, these exercises are taken to the extreme and will inevitably sound over the top/awkward. Let your ear be your guide, as it sounds like you already are, and use the ones you like and avoid the ones you don't! The point of the exercise is to strengthen your knowledge of the parent scale. If you can substitute notes on the fly it shows just how comfortable you are with the 'correct' notes and the substitution concept too. I would add that Barry Harris only substitutes dominant chord which are going 'home'. Other players, such as Dexter Gordon, apply the approach more liberally to different chord types and contexts, as I do herein. Thank you for your kind words and comments, I hope you feel a bit clearer on the concept I was presenting in this one! Cheers