About 5-6 years ago at Speedworld in Whittman Az , Bob Rigel(sp?) of the Hemi Under Glass took the time to talk and explain his car to my son who was around 14 years old at the time. Great guy, Same day a guy with a Challenger (I think his name is Billy) took the time to show and explain, demonstrate how the box shifted the car at set RPM to my son and I. He heard my kid ask me what the box was for and called us over to explain. Two great guys in one day.