So i heard some of you don't believe me when I say that an axle doesn't have to be picture perfect in order to function perfectly.
Watch.
So some rods with sliding cones seem like a good idea for checking the straightness of the holes in the axle, right? Those holes are the ones that spindles and spring perches take their reference from.
My axle in my car checks out perfect, drives and handles perfectly. But people online think that because I hadn't worked out the minor imperfection in the center (where someone had towed the car with a rope) that it is somehow a problem, it's not. Trust me.
Now here's a curly one. An axle depicted with a slightly dramatic twist in it, but its function is not in any way impaired.