First of all , i want to say : I own a lot of racing game ! but my preferred : GSC2012 ! Congratulation reiza studio for a great game like this ! I bought a buttkicker for gamer and i tried it on many racing games. This stuff is amazing ! not very powerfull but just enough , on the limit ! it add a new dimension into immersion. I am a bit dissappointed because when i tried it with rFactor i could feel the curbs very very well but with GSC i don`t feel the curbs with the buttkicker It seems to me that the signal of it is transmitted via the rear speaker not by the center/LFE. Are they something to change in the controller.ini or something like that ! thanks for your help !