No problems
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As obsolum says, powersteering helps a lot! To be simple, it is a set of hydraulic pistons in each side of the steering rack that help multiply the strength of the steering inputs.
A good comparison my father gave me some years ago is that for instance, without powersteering, it'd be a pain to turn the steering wheel of an old mercedes when standing still (speed=0), if you are bodybuilded like Schwarzenegger! An averagely muscular person would probably not even be able to steer without moving and powersteering
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On race cars, usually powersteering is chopped off since it is quite heavy, and with the slicks the steering of cars can get pretty damn heavy !
I guess (I repeat, I guess !) that LFS already simulates the FFB level with the different tires, and does it also with the weight and the aero. But I repeat again, it's a guess from my memories back in the time I still had my G25
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