I think you did the right thing. I've had two auto RTs, the first one I removed the resonators, sounded great from outside the car and I got used to the drone (was even worse with the windows up). But, when I traded it in on a new RT, I realized how much I liked driving without drone. I did eventually want a bit more sound than stock, so I removed the middle mufflers this time. Sounds awesome from inside the car, no drone. I don't think it sounds quite as good from the outside, but only slightly, so not a deal breaker.