My prairie just clicked 100 miles so over the weekend i installed a epi black and a epi red along with a twin air filter.The wife hooked me up with some 26 itp 589's and have napa getting me a #7335 (not in stock).The muffler mod is coming up shortly but i'm not sure how many or how big of holes to drill(performance is more of a issue than sound to me) Just asking for some advice from you guys that have tried a few of these mods first hand.Should i buy an adjustable needle or just shim it and what are you guys shimming it with?And what is the benifit of the holeshot module since it seems everyone has one but me?