I just did that same thing and I'm on about 5 hours of skating on orange indy conical bushings. They're comfortable but I sanded down the top bushing a bit so i can get the nut flush while keeping them loose. coming from bones, the rebound was almost the same, maybe a little slower, but hardly a problem. The best part is that you get new washers to put on with the indys and theyre almost half price. I also don't have to worry about the problems with the plastic bit (breaking or the urethane popping over them) because the indys are solid urethane.