well i managed to get 2nd at the NZ nationals with the setup i posted earlier.
Learned alot about the diff, and how to best set that up.
low traction. No tyre additives allowed:
used the hard t-bar (had no spacers for the soft t-bar

)
Kawada rears in the extreme heat worked brilliantly, pink corally rears shined with cold - moderately hot conditions.
silver fronts.
10x2 Vantage v2 motor (endurance brushes *DOH* )
IB4200s (charging at 6amp)