I have ordered a supertrapp for my FLHRI. It has the 95 big bore kit and over the winter I added AMS heads and TW26 cam. I have not yet dyno tuned it. After reading other posts here I have purchased the Summit Racing open cap and plan to use (start) with 12 discs. Does this seem correct for what I have? My understanding is that when dyno tuning you tune the AFR irrespective of the number of disks used or type of cap. If this is the case then how do you figure out the number of disks? Is is simply adding/subrtracting disks and then running it on the dyno again?