Hi anson, i am using a Tune B DC2. I find that for this tuning,
i am able to do very fast cornering. However i have changed the
wheels and side mirrors to the black colour one as they are made of
carbon thus lighter.
Regarding tune D, i only know that modification allows u to have
very fast accerleration. For tune A and C, i am not sure of what
they does. Hope this helps. 