Fantom dyno with laptop computer
3 different powered brush cutters...
motor lathe with diamond cutters.
4 to 8 different type/kinds of brushes... most with silver added.
brush juice... choice of the month.
canned Freeze. when allowed.
hours of bench testing.
several types of motor bearings.
2 or 3 different types of speed controllers.

never ending replacement of high end batteries.. some every month... and special ones for bigger races..
Turbo 30 and or Turbo 35.. added upgrades
30 to 50 amp power supplies..

10 motors minimum... every gear known to man ... spur and pinion.