Has anyone installed the $69 gf chips performance chip? My buddy just bought one and says it's a 4 wire install, not really a plug and play as advertised, says he needs an o meter to install it. He also says that the instructions say it may take up to a year for it to learn all the parameters, does that sound right? It's sold with about a $300 discount. His car is an R/T auto and he says the 2009's were simply a 2 wire install. Appreciate any advice or experience with this company or unit.