Any "race" axle that can be resplined is softer and heavier than it should be.

High end axles are machined BEFORE they are hardened. In other words, the splines stick out of an hour-glass shaped shaft, instead of being cut into an already hardened sraight shaft. The hour-glass design minimizes a stress riser where the axle splines and spool splines meet.

Neither Strange nor Mark Williams race axles can be resplined.