I would like to see more castor settings on the car. Like TC3 or MR4TC. Adjusting the spacers under the suspension blocks changes 2 settings (anti-dive/kickup & castor) at the same time. Right now I use the stock C hubs, the TA04S C hubs as well as the 04S hubs with the mounting points cut off and mounted like the racing c hubs.
Perhaps tamiya could design tiny limited slip, negative and torsen diffs for the car, oh yeah!