I am getting close to buying PC5 and slip-on exhaust combo from Fuel Moto for my 2011 Versys. I like looks and reputation of Yoshimura TRC all stainless. Fuel Moto will program PC5 based on their experience with Versys & Yosh TRC pipe so dyno run is not req'd. Will I have any significant benefits if I add Autotune to the package for an extra $200? Will the 18mm Autotune O2 sensor fit right in or will I need to weld up new 18mm O2 sensor bung? I do not anticipate doing any other modifications to motor or exhaust. I do occasionally ride at high elevations. I appreciate any help.