contact pattern

The crush sleeve and solid or shim PERFORM the same function, neither is better or makes ANYTHING stronger.

Wouldn't you agree though, that the addition of the crush sleeve eliminator removes the possibility of a crush sleeve failure? Usually, that's what causes failures in axles with crush sleeves. The sleeve crushes more and causes misalignment of gears. So if you remove it from the equation, while it certainly doesn't add strength, it does remove the possibility of crush sleeve failure, right?