Anther one. When you get gas they have it on the lowest setting to start but don't tell you.
I got to 10cm, through transition, said I had to push and they were like "would you like the gas turned up".
i went off at them "are you kidding me, crank it right up, why wasn't it turned up!!!"
So if you have gas, keep checking what level,its on especially if you're struggling.