From photos others have taken of me riding I’ve noticed I lean forward a lot more than most riders. My bars are generally about 4” lower than the saddle. I guess that’s position 2? I intentionally have higher bars on my gravel bike so maybe it’s a 3. My flexibility seems to be pretty good. I still have a really long golf backswing just like when I started playing about 60 years ago. I was hoping it might get shorter as I aged but so far it’s about the same.