Just finished listening to this one.I had seen Paul using his mouth to hold the FD controller but just found out he´s powering the thing with his tongue.
Find a missed that the guys in the podcast didnt get deeper into his tecnique or how exactly did he program the controller or the FD..
I tried to do it the other day and dint get any results.
Tongue tickler they called him, that was funny 
I too just heard that he was using his mouth. Just placed an order for some strips of astrodek type foam to give it a shot. Really makes a lot of sense.
You bite the controller’s sides. You push the trigger forward with your tongue.
https://www.instagram.com/surfdocsteve/?hl=en Surfdocsteve is the guy who came up with the technique I believe.
It works surprisingly well!
Put some traction on both sides of the controller.
Bite it with your teeth and push the trigger with your tongue.
Yeah. Thats what I was thinking. Basically some super high density foam to stick on the side was what I ordered. Figured it would save my teeth.
I personally prefer the method where I put it between my butt-cheeks. All the kegel exercises come in handy because I just flex my inner core and deftly work the trigger.
That leaves my mouth free to play the harmonica.
The way I programed my controller ,at 70% and medium on the app i think i dont have enough strenght or leverage in my tongue.. or maybe is tecnique.I wil try again later.
yeah this conversation ….
which config are you using? Normally i ride with the medium and 70% on he controller but it does not work with the tongue.