I run on asphalt and carpet.
CRC's new pod and hub are optimized for longer brushless motors and their attendant difference in weight distribution within the pod. They're for the Gen X, only. But brushless motors have been run for several years now in CRC and other 1/12th scale cars without any real problems.
That said, I'm hoping CRC will update the T-Fource soon, leaving the standard front end and simply tuning the pod/hub for brushless motors as they have the Gen X. Until then, though, I'm running it exactly as you see it.