Any kind soul want to help me with Simhub motion compensation set up?

I'm trying to get motion compensation set up in Simhub and I'm failing.
Running Bathurst and my virtual wheel is going all over the place when it's supposed to be still.

What I've done:
Downloaded all the extra bits and bobs from github and installed them correctly.
Started the game and went to the tracker set up page.
Selected and Enabled the virtual tracker in SteamVR
Aligned the tracker guide lines so the Z axis is between my legs and pointing forward, the green line comes down directly across my head. The X axis crosses my body.
Set the correct actuator travel and axis distances up in Simhub
Turned all the auto camera tilt bits on AMS2 to 0
Applied it all
Started game.

My wheel bobs all over the shop. Not correctly aligned to anything. Goes further away as I go down hill, comes closer as I go up hill. Might as well have left the compensation turned off.

What am I doing incorrectly?
Thanks