A 3D printed F1 inspired steering wheel (just the steering wheel) with a 2.8" screen, Direct Force Feedback, buttons and even a paddle shifter! Most of the parts are to be 3D printed but some parts like the motor are to be bought since they cant really be made :) 
Refer to the assembly while assembling the steering wheel. 
Alternatively if you want to fully 3D print the model, (would not recommend), you could 3D print one of the parts that I am uploading it. Print the "Steering wheel attach piece" for this motive. 
Use M3 nuts and screws in some of the places. 
I will later upload the hardware requirements for this build