just did the v mod on my exhaust today . it wasnt hard but 40.00 in hole saws sorta stunk. wow what a differance .the bike runs great (thanks fuelmoto for the great map) and it is loud . only lost a few chunks of skin too. but seriously it was not hard and well worth it in performance and sound. the retro fit pcv from fuel moto works great as well with no running or drivability issues so far. oh yeah i have a 03 anniv. bike . so if you have been wondering if the v mod is too hard for you dont. the powerpoint how-to in the how-to section was great and everything went smootly . going to go ride now as its like a new bike and alot of fun .