Gearing
Groffball is about where I am on temp on my previous B4 and XXX. I haven't run my new X6 yet.
Something else to consider are conditions. Where you run and the temperature, humidity, and type of track all have impact on temperature. Keep in my that soon we should see how the fan mounting holes that are now on the tranny and motor mount of the X6 are to be used. This would help with extreme conditions.