Originally Posted by sakadachi

I built a completely stock M05 with plastic bushings and all. For just having fun, the only 2 mods I recommend are:

1) Stiffer diff (check out how to do the MR diff aka monkeyracing diff), it is very cheap and easy to do.
2) Oil dampers (Tamiya CVA super mini #50746) will work, with yellow short springs front, red short springs rear.

My kid drives this M05 and he is having a ball. GL