Fanatec v3 Setup

[G-Slev]

I've finally invested some time in ETS2, and it's wonderful. I'm am struggling a bit though with the brake and accelerator.

I have removed the deadlines, but if I so much as touch the brakes, the truck stops dead. There's no braking distance at all.

I've also found that if I ease up on the acceleration, the revs die instantly - it's like the throttle is either on or off.

Can any of you wonderful people help, or at least point me to a setup guide please?