Congratulations on finding a strategy that works for you. This is not a trivial step. You should be pleased you found something that consistently works. I really liked how you described your thoughts on how the strategy is helping you. This is a really important piece that often gets missed when we describe strategies. However, I'm going to go all "speech scientist" on you and suggest you do more thinking about how your strategy is actually benefiting you. The description of the benefit your strategy provides doesn't match what we know about speech production. Lowering pitch and reducing tongue tension don't change where in the mouth speech sounds are made. Speech sounds are made in all areas of the mouth and they have to be produced there--small changes in tongue / lip / soft palate placement make a drastic impact. And importantly, changing the place of articulation (where they are made in the mouth) changes the sound that comes out. So, an "s" sound is always produced when the tongue tip reaches up to the alveolar ridge (that bony ridge just behind your upper teeth). Moving the tongue tip towards the back of the mouth will make it sound more like "sh." The same is true of vowels. The vowel "ee" (think of the vowel in the word "cheese") is always produced with more tongue constriction towards the front of the mouth. If you reduce the constriction in the front and increase the construction in the back it will sound like a "oo" (as in "boot"). (As a caveat, lip placement also plays a major role in these two vowels so don't be confused by the change in lip position--position of tongue construction is the primary feature). Similarly, lowering pitch will increase air pressure in the mouth but only because by reducing pitch the vocal folds are more lax. This has the combined result of requiring more air pressure from the lungs to start vocal fold vibration and the vocal folds are open slightly longer than at high pitches. So it's not that your strategy changes where sounds are produced in the mouth or the flow of air through the mouth, it's something different. I have ideas as to how it's helping you and I'm happy to provide any feedback should you want it.