I am working on prepping my HB TCX that has been sitting for some USGT action. I found out the guys at my local track usually run between a 3.4-3.6 FDR for the class. My car is currently setup for 17.5 blinky with a FDR around 4.0 so I have a few pinions around the 45-47T (64P) range. In order to use those pinions in USGT, I would have to drop the spur from 96T to somewhere in the 81-85T range. Does anyone run spurs that small? Would there even be enough adjustment range to properly mesh that range of gearing? I know buying bigger pinions is probably easier, I'm just curious if people have tried this in the past.