Teknoparrot have added ffb support
FFB means Force feedback if you didn't know
Only works on Inital D6 and Initial D7 so far but only one of the devs has a wheel and he can't work out the ffb to work arcade-perfect
It's works with SDL2 and has been left open source (to be fixed by community) is the official statement from them
Plugin goes into game folder and works with Logitech G25 and G27 wheels that I know if, not sure if all wheels
It works but there is issues when turning the wheel and ffb feels wierd...needs some love from a coder who can work it out better
Instructions to make plugin is on source code page
Source code
https://github.com/teknogods/TeknoFfbOne of the devs said
current ffb is literally just the raw data sent to serial but with names from id5 code so all the data is there