(issued)need help with the configuration of the tools ,2DOF RC model

Thanks for the suggestion by @eaorobbie , I have build the model now ,and successful for the axis test . but now I have a problem when I run the game (LFS), the axis are shaking always and they are not simulated driving state in the course of the game, just shaking.I have read the tutorials of the engine and the manager ,but I still don't find a way to solve the problem.
I have tried for changing the Axis assigments to different sim force ,they are testing good, I think maybe the catching data of the LFS from the tuning center is wrong,you can see it in the video.
Here is the video of the situation which let me headache. is there anyone can help with this? thank you very much!

this is the test of the axis

and the pictures of the setting

Thanks for your replay ,I tried the to use the Sway and Surge, but there is nothing change better, I think maybe catching data of the tuning center is the problem,and the max/min value was adjusted by myself,because the data of the output testing is between 32767/-32767 when I slide the bar in the output testing window.And now I have reset the value and caught a new data from the game for save . the servo is not shaking like before ,but it looks too calm and basically don't move when I drive the car ,just occasionally shake a bit.
Here is the pictures of the setting.



Here is the wiring of the hardware

Ok a little training is needed I see.

Start the Game Engine and modify the Axis Assignments so that only SURGE has a %.
Then start the Game Manager, make sure the profile is set to 100% and no sliders are set.
Fire the game in a window, and the Game Engines tuning centre.
Now dealing with SWAY you need to corner aggressively to produce a sway movement , if the chair is not swaying out to it 60% of movement set then the values for sway you are using are too large and you need to lessen them but if it gets there very quickly then the values are not large enough, meaning your loosing a lot of the detail because the min and max is too small.
Once happy with the SWAY movement.
Close the Game Manager completely , this will allow you access to the Game Engines Axis Assignments, change the Sway % to 0 and increase the Surge % to what you require, test and adjust as above.
Once happy with the Surge movements, you can close the Game Manager and readjust the Axis Assignments back to what you want.
This should produce a nice movement in the model.

I have tried again ,but it was still not work like normal ,please look at the video,you can see the number of the tuning center which are catching from the game is very unstable , even invisible the digital are increasing or decreasing ,they are always jumping.
I use the plugin for LFS is comes with the simtools when I download it ,do I need to download the plugin alone?

Just tryieng to help but ... Am I missing something ? or these settings are weird

Arduino should be like this ...

I used the interface setting config supply by @eaorobbie, the test of the axis is fine, I think the problem is the catching data from the tuning center.

Here is my settings ... Enable the HD

No @speedy his using my Ard RC Model code and has the setting correct in the interface, settings you have shown I believe is for Mats code for DC motors.
Feel the issue is understanding how to setup simtools once in game , Tuning the MinMax to suit the Models actions, the first step a lot of people seem to falling over at. I have a partial tutorial that will explain all this as this is not fully explained in our documentation, this wont be another quick start but a more in depth explanation on how to setup and why we setup in this way so to help newbies get a sim rock n rolling faster. SimTools is quite simple compared to most systems I have used over the years.

thanks for your guidance ,I just be entangled with the input digital are different with others which I see from others video ,I can see the numbers of the input data windowns are increasing or decreasing,like"130.XXXE+XXX",but my numbers are just twinkle ，and feel the value is very small.I dont know why ?why different?
I'm sorry for my foolish!

Thanks for every who helped me! the problem has been issued ,I changed the language of my system,and everything is fine now.I tried the model for two games--LFS and DIRT2, both performance in these game is looks good,and spend a little time to adjust the tunning center by @eaorobbie 's help ,and thanks again and very much!
here is the video for my RC model ,yes i build a new one with the DC motor ,this will be close to the real simulation, dont' care about the shaking sometimes, it's the potentiometer's prolem,It is of poor quality.
if anyone need the blueprint of the RC model ,I'll share it here.

the servo RC model video .