some guys at my track use them pending on the lay out and the car. also track conditions if its dry and dusty or wet and slippery. try it out under several different conditions and or lay outs and see how you like it. my one friend says his losi xxx-cr wont steer with out it. i guess its a personal prefernce...
kyoslo RB5/ novak motors/ LRP sphere/ m11/ orion 4800,3800,3600/ blazin chronic racing/wphukuall radio/ raikkonen body/ mongoosed km-mini inferno with the multiplex red ass servo that owns johnny b-main and drew/ now at lir the JDM zx-5 sp mugen edition
"team bad guys"