Finally got a polish on the Predators that I am happy with and ready to give them a try; however, it appears that the hub is slightly smaller in length than a BASX Pro or Cheetah. Are people who are running Predators using a delrin spacer or are you notching the body? It seems that there just is not enough clearance between the inner wheel edge and the body with just a delrin washer. It's VERY VERY close.