The only must have for the transmission is the the slipper and 501/3 racing diff halves in the rear only.
The suspension blocks are available from 3 racing for less than the tamiya equivalents too.
the rest is just personal preference in my opinion and can be done as the originals wear out.
Better dampers will make a big difference too, TRF or Associated/Losi are better than the standard ones and will all fit straight on (although all may need limiters in the rear to stop too much droop)
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