Nice work on the headstock Christian! My only tip would be that while basswood is soft enough to screw into without pilot holes (although I still do pre-drill), make sure you still put a dab of wax on the screws before finally screwing them in.

As far as staining the headstock, I'm firmly in the school of keeping headstocks natural - but it's such a personal decision rather than a right or wrong thing. Go with what makes you happy!