E Revo Center Diff questions and Opinions

[simplechamp]

Not sure what I want to do next, maybe cut and drill the Traxxas output shafts. Thinking of sourcing a local machine shop to drill and tap the holes in the cap because I don't want to screw it up and bust off a tap in the hardened steel.

[shaunjohnson]

are the spurs made from hardened or high speed steel?
cause i could use the lathe instead.