The title gave it away a bit, but I'm wondering which order is best. a) If I glue in the truss rod (aluminum u-channel) before I shape the neck and headstock, I have a greater change that the neck will stay straight. b) But if I don't, the neck will more likely warp and I'm able to correct that with a plane or so (it will be a not-so-fun-to-do thing, because I have to route the truss rod channel again afterwards). Using the latter approach, I think the wood of the neck would be more stabilized in the end. But in a way, I'd like to go with the first option, because that saves me a lot of work..