Does anyone have any experience with the Series E Slip ons. I read on the their site that they suggest replacing the third disk on the left side with a blank disk and the pipes will flow much like a 2 into 1. Is anyone running this setup? Is it the third disk from the end of the pipe or the inner portion where the disks first attach to the pipe? I have a new RK Classic FI on order. After break in I initially plan on installing the SE Stage I kit, a power commander and slip on's. I've been considering the series E, I understand they have good torque qualities.