Hi Ben
i tried a few times to dive -50m but all time as you said i stucked -30 or -32.. meanwhile .. i never remember equilization in water..directly diving into deep.. my ears equalise itself and never wants any help from me..moving my chin very slowly left/right it equlise or sometimes it does itself ...after -30m everythings stop and a word comes from my body says go back...it equalise itself why it stop line -25/30 ? forced one time i dive to -39m /-41m..don't ask me why?
i am sure i felt a very little pain in my ears after -35

, i had turned around like a deaf for 2 days..
why my body never let go deeper..i am getting crayz for that..
sometimes i ask to myself do i dive -100m ? Yes ...i got a rope -100m and look at it from a point to another it appared in my mind like -20m.. this idea makes me believe Yeah! it is so easy to go below -50m..
my plan is to try next time by flusing all my sinus.. this time i will check what my body gonna say?
anyway Ben i hope you would have understood my english and my question...
addition:
deepwater technique(??)
can you open it a little bit more what exercise you suggest for it