In my opinion wrekckfest is very simple. You don't need any other settings than for assetto or rF2 or similar Sims.
I always use 900° with my logitech g27 and the sliders at 100%. Then dial everything in from within the game.
Like you'll read in Paul's thread, the most important setting is to put
"saturation" to 50% which will result in pretty perfectly 1:1 steering angle (if you go into cockpit camera).
This means you'll end up with about 450° steering angle.
I use 45%, have to turn even a little less in tight turns.
Ffb strength or whatever it's called to your liking and you're good to go
So with a t300, I'd recommend:
Center spring: off
900° or 1080°
This should be default I guess?
And in the game:
Strength/intensity (not sure): between 60-80