This is something that has come out of a bit of a challenge that came up in another thread.  @Bassmingo has a nice Squier and described the neck as "classic ski jump". Well, I've fixed a few of those so I said, "That's fixable" etc, etc... So as a result the neck arrived here today. After unpacking it seems the truss rod works fine. I can get it straight and to back-bow with the truss rod. What's not so clever is the twist in the neck. The twist must be something like 4-5 degrees