The problem I have with the aftermarket axle is lack of keyways for the slotted washers.
I'd prefer to use keyed washers, but the likelihood of slotting an axle seems iffy.
The aftermarket axle I have here has very short slots, just on the outside and my races seat quite far in, narrow hubs.
My old races don't jive with the threads on the new axle, if only I have a tap/die in this size, maybe I could make it work by rethreading the cones.
Weirdly enough, the locknuts spin on just fine, but the races/cones no go.
Murphy was an optimist.