| | I am not really interested in the placebo effect on drivers,  I am only interested in getting faster lap times. I will ask the driver there opinion, after a chassis set up change, some drivers are completly hopeless at feedback, some are very good, a few are brilliant...it is all about experience when it comes to setting up a chassis and chassis change, there is no rule book. 
 I have had drivers win major championships for me  that were hopeless at feedback, but mega fast drivers...you would make a chassis or motor change  and ask there opinion about it and they would say " its cr*p"  or " its brilliant" they could not tell me why, although I already knew.  Another driver will  give me very very accurate feedback  on every change we made, and be spot on with, backed up by the data...... I have said it many times on here,  it depends at what level  you are at in you  karting career....my best advice is  always. always, always  ignore pitlane bulls@@t
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