Have it installed just before the tune. It doesn't take long.
once you do figure it out. do your own little version of a how to. mine is comming in the mail hopefullyI read up on the how to for it but i'm still not sure exactly how to install it.
I have Perrin and it's very simPle install.I read up on the how to for it but i'm still not sure exactly how to install it.