Hey Bob,
Also, here is another method to look at for future projects. Remember that working in patches is going to make it much harder. Steve is very good with modeling and probably has a few years of experience in it.

A better way to get good results is to use "solids" and cut them up to make your object. Here is an example file I made. I didnt use your curves but it will illustrate getting shapes with great surfacing in a much simpler fashion. This headstock is a bit off from yours, but if you look at the setup on the blanked layer, you can see how easy it was and could adjust some curves to get an exact result.

Anyway, just more food for thought.