Is it completely necessary for a PCIII if I install a set of Remus slip-ons on my 999? An employee/co-owner? of my local Duc shop has an '05 999 with Remus slip-ons and he is not using a PCIII, only the stock mapping. However, they did tweak the fuel/air mixture a bit after the install. He said it runs great and doesn't appear to run rich or lean. He fired it up for me and it sounded great at idle. That said, what are your opinions to my question... do you all feel a power commander is or isn't necessary? If it's not necessary, exactly how do you tweak the air/fuel ratio? Is it something I could do myself or do I need to have my shop do it? I plan on installing the slip-ons myself and would like to do everything else myself if possible. If I do get a PCIII, after I install it along with the slip-ons, will I need to have any other adjustments done by a tech, or will I be good to go? Thanks.